Science has now proved humans can’t help talking about themselves. It just feels too good. In a new study, Harvard University researchers conducted a series of experiments to 1______how much people liked talking about themselves and why. In one study, they scanned people’s brains 2______those people either revealed personal information about themselves or 3______the opinions of others. In another experiment, researchers tested whether people preferred to answer questions about themselves, other people or 4______facts—participants got differing levels of monetary compensation 5______on the question they chose. No matter the test, the researchers found the results pointed the same way: humans get a biochemical excitement from 6______. That’s 7______we spend almost 40% of conversation talking about ourselves, says the study—our brain chemistry 8______us to do it. In the first experiment, researchers found that sharing personal information led to 9______in the reward areas of the brain—the same ones that are 10______in response to rewards like food. Talking about other people did not 11______the circuits as much. In the second experiment, people were willing to 12______17% of their earnings in order to answer questions about themselves. The researchers also noted that people 13______enjoyed self-disclosure if they knew other people were listening. When people were given a choice to share their responses with others or to keep them 14______, they sacrificed 25% of their potential earnings in order to 15______the personal information. Previously, humans’ 16______for talking about themselves was thought to be caused by a desire for 17______with others, a way to open up to people and get them to trust us 18______in hopes of setting the foundation for friendship. 19______this appears to be the first study to 20______that people talk about themselves mainly because they like the way it feels. 第（1）题选______。

Science has now proved humans can’t help talking about themselves. It just feels too good. In a new study, Harvard University researchers conducted a series of experiments to 1______how much people liked talking about themselves and why. In one study, they scanned people’s brains 2______those people either revealed personal information about themselves or 3______the opinions of others. In another experiment, researchers tested whether people preferred to answer questions about themselves, other people or 4______facts—participants got differing levels of monetary compensation 5______on the question they chose. No matter the test, the researchers found the results pointed the same way: humans get a biochemical excitement from 6______. That’s 7______we spend almost 40% of conversation talking about ourselves, says the study—our brain chemistry 8______us to do it. In the first experiment, researchers found that sharing personal information led to 9______in the reward areas of the brain—the same ones that are 10______in response to rewards like food. Talking about other people did not 11______the circuits as much. In the second experiment, people were willing to 12______17% of their earnings in order to answer questions about themselves. The researchers also noted that people 13______enjoyed self-disclosure if they knew other people were listening. When people were given a choice to share their responses with others or to keep them 14______, they sacrificed 25% of their potential earnings in order to 15______the personal information. Previously, humans’ 16______for talking about themselves was thought to be caused by a desire for 17______with others, a way to open up to people and get them to trust us 18______in hopes of setting the foundation for friendship. 19______this appears to be the first study to 20______that people talk about themselves mainly because they like the way it feels. 第（2）题选______。

Science has now proved humans can’t help talking about themselves. It just feels too good. In a new study, Harvard University researchers conducted a series of experiments to 1______how much people liked talking about themselves and why. In one study, they scanned people’s brains 2______those people either revealed personal information about themselves or 3______the opinions of others. In another experiment, researchers tested whether people preferred to answer questions about themselves, other people or 4______facts—participants got differing levels of monetary compensation 5______on the question they chose. No matter the test, the researchers found the results pointed the same way: humans get a biochemical excitement from 6______. That’s 7______we spend almost 40% of conversation talking about ourselves, says the study—our brain chemistry 8______us to do it. In the first experiment, researchers found that sharing personal information led to 9______in the reward areas of the brain—the same ones that are 10______in response to rewards like food. Talking about other people did not 11______the circuits as much. In the second experiment, people were willing to 12______17% of their earnings in order to answer questions about themselves. The researchers also noted that people 13______enjoyed self-disclosure if they knew other people were listening. When people were given a choice to share their responses with others or to keep them 14______, they sacrificed 25% of their potential earnings in order to 15______the personal information. Previously, humans’ 16______for talking about themselves was thought to be caused by a desire for 17______with others, a way to open up to people and get them to trust us 18______in hopes of setting the foundation for friendship. 19______this appears to be the first study to 20______that people talk about themselves mainly because they like the way it feels. 第（3）题选______。

Science has now proved humans can’t help talking about themselves. It just feels too good. In a new study, Harvard University researchers conducted a series of experiments to 1______how much people liked talking about themselves and why. In one study, they scanned people’s brains 2______those people either revealed personal information about themselves or 3______the opinions of others. In another experiment, researchers tested whether people preferred to answer questions about themselves, other people or 4______facts—participants got differing levels of monetary compensation 5______on the question they chose. No matter the test, the researchers found the results pointed the same way: humans get a biochemical excitement from 6______. That’s 7______we spend almost 40% of conversation talking about ourselves, says the study—our brain chemistry 8______us to do it. In the first experiment, researchers found that sharing personal information led to 9______in the reward areas of the brain—the same ones that are 10______in response to rewards like food. Talking about other people did not 11______the circuits as much. In the second experiment, people were willing to 12______17% of their earnings in order to answer questions about themselves. The researchers also noted that people 13______enjoyed self-disclosure if they knew other people were listening. When people were given a choice to share their responses with others or to keep them 14______, they sacrificed 25% of their potential earnings in order to 15______the personal information. Previously, humans’ 16______for talking about themselves was thought to be caused by a desire for 17______with others, a way to open up to people and get them to trust us 18______in hopes of setting the foundation for friendship. 19______this appears to be the first study to 20______that people talk about themselves mainly because they like the way it feels. 第（4）题选______。

Science has now proved humans can’t help talking about themselves. It just feels too good. In a new study, Harvard University researchers conducted a series of experiments to 1______how much people liked talking about themselves and why. In one study, they scanned people’s brains 2______those people either revealed personal information about themselves or 3______the opinions of others. In another experiment, researchers tested whether people preferred to answer questions about themselves, other people or 4______facts—participants got differing levels of monetary compensation 5______on the question they chose. No matter the test, the researchers found the results pointed the same way: humans get a biochemical excitement from 6______. That’s 7______we spend almost 40% of conversation talking about ourselves, says the study—our brain chemistry 8______us to do it. In the first experiment, researchers found that sharing personal information led to 9______in the reward areas of the brain—the same ones that are 10______in response to rewards like food. Talking about other people did not 11______the circuits as much. In the second experiment, people were willing to 12______17% of their earnings in order to answer questions about themselves. The researchers also noted that people 13______enjoyed self-disclosure if they knew other people were listening. When people were given a choice to share their responses with others or to keep them 14______, they sacrificed 25% of their potential earnings in order to 15______the personal information. Previously, humans’ 16______for talking about themselves was thought to be caused by a desire for 17______with others, a way to open up to people and get them to trust us 18______in hopes of setting the foundation for friendship. 19______this appears to be the first study to 20______that people talk about themselves mainly because they like the way it feels. 第（5）题选______。

Science has now proved humans can’t help talking about themselves. It just feels too good. In a new study, Harvard University researchers conducted a series of experiments to 1______how much people liked talking about themselves and why. In one study, they scanned people’s brains 2______those people either revealed personal information about themselves or 3______the opinions of others. In another experiment, researchers tested whether people preferred to answer questions about themselves, other people or 4______facts—participants got differing levels of monetary compensation 5______on the question they chose. No matter the test, the researchers found the results pointed the same way: humans get a biochemical excitement from 6______. That’s 7______we spend almost 40% of conversation talking about ourselves, says the study—our brain chemistry 8______us to do it. In the first experiment, researchers found that sharing personal information led to 9______in the reward areas of the brain—the same ones that are 10______in response to rewards like food. Talking about other people did not 11______the circuits as much. In the second experiment, people were willing to 12______17% of their earnings in order to answer questions about themselves. The researchers also noted that people 13______enjoyed self-disclosure if they knew other people were listening. When people were given a choice to share their responses with others or to keep them 14______, they sacrificed 25% of their potential earnings in order to 15______the personal information. Previously, humans’ 16______for talking about themselves was thought to be caused by a desire for 17______with others, a way to open up to people and get them to trust us 18______in hopes of setting the foundation for friendship. 19______this appears to be the first study to 20______that people talk about themselves mainly because they like the way it feels. 第（6）题选______。

Science has now proved humans can’t help talking about themselves. It just feels too good. In a new study, Harvard University researchers conducted a series of experiments to 1______how much people liked talking about themselves and why. In one study, they scanned people’s brains 2______those people either revealed personal information about themselves or 3______the opinions of others. In another experiment, researchers tested whether people preferred to answer questions about themselves, other people or 4______facts—participants got differing levels of monetary compensation 5______on the question they chose. No matter the test, the researchers found the results pointed the same way: humans get a biochemical excitement from 6______. That’s 7______we spend almost 40% of conversation talking about ourselves, says the study—our brain chemistry 8______us to do it. In the first experiment, researchers found that sharing personal information led to 9______in the reward areas of the brain—the same ones that are 10______in response to rewards like food. Talking about other people did not 11______the circuits as much. In the second experiment, people were willing to 12______17% of their earnings in order to answer questions about themselves. The researchers also noted that people 13______enjoyed self-disclosure if they knew other people were listening. When people were given a choice to share their responses with others or to keep them 14______, they sacrificed 25% of their potential earnings in order to 15______the personal information. Previously, humans’ 16______for talking about themselves was thought to be caused by a desire for 17______with others, a way to open up to people and get them to trust us 18______in hopes of setting the foundation for friendship. 19______this appears to be the first study to 20______that people talk about themselves mainly because they like the way it feels. 第（7）题选______。

Science has now proved humans can’t help talking about themselves. It just feels too good. In a new study, Harvard University researchers conducted a series of experiments to 1______how much people liked talking about themselves and why. In one study, they scanned people’s brains 2______those people either revealed personal information about themselves or 3______the opinions of others. In another experiment, researchers tested whether people preferred to answer questions about themselves, other people or 4______facts—participants got differing levels of monetary compensation 5______on the question they chose. No matter the test, the researchers found the results pointed the same way: humans get a biochemical excitement from 6______. That’s 7______we spend almost 40% of conversation talking about ourselves, says the study—our brain chemistry 8______us to do it. In the first experiment, researchers found that sharing personal information led to 9______in the reward areas of the brain—the same ones that are 10______in response to rewards like food. Talking about other people did not 11______the circuits as much. In the second experiment, people were willing to 12______17% of their earnings in order to answer questions about themselves. The researchers also noted that people 13______enjoyed self-disclosure if they knew other people were listening. When people were given a choice to share their responses with others or to keep them 14______, they sacrificed 25% of their potential earnings in order to 15______the personal information. Previously, humans’ 16______for talking about themselves was thought to be caused by a desire for 17______with others, a way to open up to people and get them to trust us 18______in hopes of setting the foundation for friendship. 19______this appears to be the first study to 20______that people talk about themselves mainly because they like the way it feels. 第（8）题选______。

Science has now proved humans can’t help talking about themselves. It just feels too good. In a new study, Harvard University researchers conducted a series of experiments to 1______how much people liked talking about themselves and why. In one study, they scanned people’s brains 2______those people either revealed personal information about themselves or 3______the opinions of others. In another experiment, researchers tested whether people preferred to answer questions about themselves, other people or 4______facts—participants got differing levels of monetary compensation 5______on the question they chose. No matter the test, the researchers found the results pointed the same way: humans get a biochemical excitement from 6______. That’s 7______we spend almost 40% of conversation talking about ourselves, says the study—our brain chemistry 8______us to do it. In the first experiment, researchers found that sharing personal information led to 9______in the reward areas of the brain—the same ones that are 10______in response to rewards like food. Talking about other people did not 11______the circuits as much. In the second experiment, people were willing to 12______17% of their earnings in order to answer questions about themselves. The researchers also noted that people 13______enjoyed self-disclosure if they knew other people were listening. When people were given a choice to share their responses with others or to keep them 14______, they sacrificed 25% of their potential earnings in order to 15______the personal information. Previously, humans’ 16______for talking about themselves was thought to be caused by a desire for 17______with others, a way to open up to people and get them to trust us 18______in hopes of setting the foundation for friendship. 19______this appears to be the first study to 20______that people talk about themselves mainly because they like the way it feels. 第（9）题选______。

Science has now proved humans can’t help talking about themselves. It just feels too good. In a new study, Harvard University researchers conducted a series of experiments to 1______how much people liked talking about themselves and why. In one study, they scanned people’s brains 2______those people either revealed personal information about themselves or 3______the opinions of others. In another experiment, researchers tested whether people preferred to answer questions about themselves, other people or 4______facts—participants got differing levels of monetary compensation 5______on the question they chose. No matter the test, the researchers found the results pointed the same way: humans get a biochemical excitement from 6______. That’s 7______we spend almost 40% of conversation talking about ourselves, says the study—our brain chemistry 8______us to do it. In the first experiment, researchers found that sharing personal information led to 9______in the reward areas of the brain—the same ones that are 10______in response to rewards like food. Talking about other people did not 11______the circuits as much. In the second experiment, people were willing to 12______17% of their earnings in order to answer questions about themselves. The researchers also noted that people 13______enjoyed self-disclosure if they knew other people were listening. When people were given a choice to share their responses with others or to keep them 14______, they sacrificed 25% of their potential earnings in order to 15______the personal information. Previously, humans’ 16______for talking about themselves was thought to be caused by a desire for 17______with others, a way to open up to people and get them to trust us 18______in hopes of setting the foundation for friendship. 19______this appears to be the first study to 20______that people talk about themselves mainly because they like the way it feels. 第（10）题选______。

Science has now proved humans can’t help talking about themselves. It just feels too good. In a new study, Harvard University researchers conducted a series of experiments to 1______how much people liked talking about themselves and why. In one study, they scanned people’s brains 2______those people either revealed personal information about themselves or 3______the opinions of others. In another experiment, researchers tested whether people preferred to answer questions about themselves, other people or 4______facts—participants got differing levels of monetary compensation 5______on the question they chose. No matter the test, the researchers found the results pointed the same way: humans get a biochemical excitement from 6______. That’s 7______we spend almost 40% of conversation talking about ourselves, says the study—our brain chemistry 8______us to do it. In the first experiment, researchers found that sharing personal information led to 9______in the reward areas of the brain—the same ones that are 10______in response to rewards like food. Talking about other people did not 11______the circuits as much. In the second experiment, people were willing to 12______17% of their earnings in order to answer questions about themselves. The researchers also noted that people 13______enjoyed self-disclosure if they knew other people were listening. When people were given a choice to share their responses with others or to keep them 14______, they sacrificed 25% of their potential earnings in order to 15______the personal information. Previously, humans’ 16______for talking about themselves was thought to be caused by a desire for 17______with others, a way to open up to people and get them to trust us 18______in hopes of setting the foundation for friendship. 19______this appears to be the first study to 20______that people talk about themselves mainly because they like the way it feels. 第（11）题选______。

Science has now proved humans can’t help talking about themselves. It just feels too good. In a new study, Harvard University researchers conducted a series of experiments to 1______how much people liked talking about themselves and why. In one study, they scanned people’s brains 2______those people either revealed personal information about themselves or 3______the opinions of others. In another experiment, researchers tested whether people preferred to answer questions about themselves, other people or 4______facts—participants got differing levels of monetary compensation 5______on the question they chose. No matter the test, the researchers found the results pointed the same way: humans get a biochemical excitement from 6______. That’s 7______we spend almost 40% of conversation talking about ourselves, says the study—our brain chemistry 8______us to do it. In the first experiment, researchers found that sharing personal information led to 9______in the reward areas of the brain—the same ones that are 10______in response to rewards like food. Talking about other people did not 11______the circuits as much. In the second experiment, people were willing to 12______17% of their earnings in order to answer questions about themselves. The researchers also noted that people 13______enjoyed self-disclosure if they knew other people were listening. When people were given a choice to share their responses with others or to keep them 14______, they sacrificed 25% of their potential earnings in order to 15______the personal information. Previously, humans’ 16______for talking about themselves was thought to be caused by a desire for 17______with others, a way to open up to people and get them to trust us 18______in hopes of setting the foundation for friendship. 19______this appears to be the first study to 20______that people talk about themselves mainly because they like the way it feels. 第（12）题选______。

Science has now proved humans can’t help talking about themselves. It just feels too good. In a new study, Harvard University researchers conducted a series of experiments to 1______how much people liked talking about themselves and why. In one study, they scanned people’s brains 2______those people either revealed personal information about themselves or 3______the opinions of others. In another experiment, researchers tested whether people preferred to answer questions about themselves, other people or 4______facts—participants got differing levels of monetary compensation 5______on the question they chose. No matter the test, the researchers found the results pointed the same way: humans get a biochemical excitement from 6______. That’s 7______we spend almost 40% of conversation talking about ourselves, says the study—our brain chemistry 8______us to do it. In the first experiment, researchers found that sharing personal information led to 9______in the reward areas of the brain—the same ones that are 10______in response to rewards like food. Talking about other people did not 11______the circuits as much. In the second experiment, people were willing to 12______17% of their earnings in order to answer questions about themselves. The researchers also noted that people 13______enjoyed self-disclosure if they knew other people were listening. When people were given a choice to share their responses with others or to keep them 14______, they sacrificed 25% of their potential earnings in order to 15______the personal information. Previously, humans’ 16______for talking about themselves was thought to be caused by a desire for 17______with others, a way to open up to people and get them to trust us 18______in hopes of setting the foundation for friendship. 19______this appears to be the first study to 20______that people talk about themselves mainly because they like the way it feels. 第（13）题选______。

Science has now proved humans can’t help talking about themselves. It just feels too good. In a new study, Harvard University researchers conducted a series of experiments to 1______how much people liked talking about themselves and why. In one study, they scanned people’s brains 2______those people either revealed personal information about themselves or 3______the opinions of others. In another experiment, researchers tested whether people preferred to answer questions about themselves, other people or 4______facts—participants got differing levels of monetary compensation 5______on the question they chose. No matter the test, the researchers found the results pointed the same way: humans get a biochemical excitement from 6______. That’s 7______we spend almost 40% of conversation talking about ourselves, says the study—our brain chemistry 8______us to do it. In the first experiment, researchers found that sharing personal information led to 9______in the reward areas of the brain—the same ones that are 10______in response to rewards like food. Talking about other people did not 11______the circuits as much. In the second experiment, people were willing to 12______17% of their earnings in order to answer questions about themselves. The researchers also noted that people 13______enjoyed self-disclosure if they knew other people were listening. When people were given a choice to share their responses with others or to keep them 14______, they sacrificed 25% of their potential earnings in order to 15______the personal information. Previously, humans’ 16______for talking about themselves was thought to be caused by a desire for 17______with others, a way to open up to people and get them to trust us 18______in hopes of setting the foundation for friendship. 19______this appears to be the first study to 20______that people talk about themselves mainly because they like the way it feels. 第（14）题选______。

Science has now proved humans can’t help talking about themselves. It just feels too good. In a new study, Harvard University researchers conducted a series of experiments to 1______how much people liked talking about themselves and why. In one study, they scanned people’s brains 2______those people either revealed personal information about themselves or 3______the opinions of others. In another experiment, researchers tested whether people preferred to answer questions about themselves, other people or 4______facts—participants got differing levels of monetary compensation 5______on the question they chose. No matter the test, the researchers found the results pointed the same way: humans get a biochemical excitement from 6______. That’s 7______we spend almost 40% of conversation talking about ourselves, says the study—our brain chemistry 8______us to do it. In the first experiment, researchers found that sharing personal information led to 9______in the reward areas of the brain—the same ones that are 10______in response to rewards like food. Talking about other people did not 11______the circuits as much. In the second experiment, people were willing to 12______17% of their earnings in order to answer questions about themselves. The researchers also noted that people 13______enjoyed self-disclosure if they knew other people were listening. When people were given a choice to share their responses with others or to keep them 14______, they sacrificed 25% of their potential earnings in order to 15______the personal information. Previously, humans’ 16______for talking about themselves was thought to be caused by a desire for 17______with others, a way to open up to people and get them to trust us 18______in hopes of setting the foundation for friendship. 19______this appears to be the first study to 20______that people talk about themselves mainly because they like the way it feels. 第（15）题选______。

Science has now proved humans can’t help talking about themselves. It just feels too good. In a new study, Harvard University researchers conducted a series of experiments to 1______how much people liked talking about themselves and why. In one study, they scanned people’s brains 2______those people either revealed personal information about themselves or 3______the opinions of others. In another experiment, researchers tested whether people preferred to answer questions about themselves, other people or 4______facts—participants got differing levels of monetary compensation 5______on the question they chose. No matter the test, the researchers found the results pointed the same way: humans get a biochemical excitement from 6______. That’s 7______we spend almost 40% of conversation talking about ourselves, says the study—our brain chemistry 8______us to do it. In the first experiment, researchers found that sharing personal information led to 9______in the reward areas of the brain—the same ones that are 10______in response to rewards like food. Talking about other people did not 11______the circuits as much. In the second experiment, people were willing to 12______17% of their earnings in order to answer questions about themselves. The researchers also noted that people 13______enjoyed self-disclosure if they knew other people were listening. When people were given a choice to share their responses with others or to keep them 14______, they sacrificed 25% of their potential earnings in order to 15______the personal information. Previously, humans’ 16______for talking about themselves was thought to be caused by a desire for 17______with others, a way to open up to people and get them to trust us 18______in hopes of setting the foundation for friendship. 19______this appears to be the first study to 20______that people talk about themselves mainly because they like the way it feels. 第（16）题选______。

Science has now proved humans can’t help talking about themselves. It just feels too good. In a new study, Harvard University researchers conducted a series of experiments to 1______how much people liked talking about themselves and why. In one study, they scanned people’s brains 2______those people either revealed personal information about themselves or 3______the opinions of others. In another experiment, researchers tested whether people preferred to answer questions about themselves, other people or 4______facts—participants got differing levels of monetary compensation 5______on the question they chose. No matter the test, the researchers found the results pointed the same way: humans get a biochemical excitement from 6______. That’s 7______we spend almost 40% of conversation talking about ourselves, says the study—our brain chemistry 8______us to do it. In the first experiment, researchers found that sharing personal information led to 9______in the reward areas of the brain—the same ones that are 10______in response to rewards like food. Talking about other people did not 11______the circuits as much. In the second experiment, people were willing to 12______17% of their earnings in order to answer questions about themselves. The researchers also noted that people 13______enjoyed self-disclosure if they knew other people were listening. When people were given a choice to share their responses with others or to keep them 14______, they sacrificed 25% of their potential earnings in order to 15______the personal information. Previously, humans’ 16______for talking about themselves was thought to be caused by a desire for 17______with others, a way to open up to people and get them to trust us 18______in hopes of setting the foundation for friendship. 19______this appears to be the first study to 20______that people talk about themselves mainly because they like the way it feels. 第（17）题选______。

Science has now proved humans can’t help talking about themselves. It just feels too good. In a new study, Harvard University researchers conducted a series of experiments to 1______how much people liked talking about themselves and why. In one study, they scanned people’s brains 2______those people either revealed personal information about themselves or 3______the opinions of others. In another experiment, researchers tested whether people preferred to answer questions about themselves, other people or 4______facts—participants got differing levels of monetary compensation 5______on the question they chose. No matter the test, the researchers found the results pointed the same way: humans get a biochemical excitement from 6______. That’s 7______we spend almost 40% of conversation talking about ourselves, says the study—our brain chemistry 8______us to do it. In the first experiment, researchers found that sharing personal information led to 9______in the reward areas of the brain—the same ones that are 10______in response to rewards like food. Talking about other people did not 11______the circuits as much. In the second experiment, people were willing to 12______17% of their earnings in order to answer questions about themselves. The researchers also noted that people 13______enjoyed self-disclosure if they knew other people were listening. When people were given a choice to share their responses with others or to keep them 14______, they sacrificed 25% of their potential earnings in order to 15______the personal information. Previously, humans’ 16______for talking about themselves was thought to be caused by a desire for 17______with others, a way to open up to people and get them to trust us 18______in hopes of setting the foundation for friendship. 19______this appears to be the first study to 20______that people talk about themselves mainly because they like the way it feels. 第（18）题选______。

Science has now proved humans can’t help talking about themselves. It just feels too good. In a new study, Harvard University researchers conducted a series of experiments to 1______how much people liked talking about themselves and why. In one study, they scanned people’s brains 2______those people either revealed personal information about themselves or 3______the opinions of others. In another experiment, researchers tested whether people preferred to answer questions about themselves, other people or 4______facts—participants got differing levels of monetary compensation 5______on the question they chose. No matter the test, the researchers found the results pointed the same way: humans get a biochemical excitement from 6______. That’s 7______we spend almost 40% of conversation talking about ourselves, says the study—our brain chemistry 8______us to do it. In the first experiment, researchers found that sharing personal information led to 9______in the reward areas of the brain—the same ones that are 10______in response to rewards like food. Talking about other people did not 11______the circuits as much. In the second experiment, people were willing to 12______17% of their earnings in order to answer questions about themselves. The researchers also noted that people 13______enjoyed self-disclosure if they knew other people were listening. When people were given a choice to share their responses with others or to keep them 14______, they sacrificed 25% of their potential earnings in order to 15______the personal information. Previously, humans’ 16______for talking about themselves was thought to be caused by a desire for 17______with others, a way to open up to people and get them to trust us 18______in hopes of setting the foundation for friendship. 19______this appears to be the first study to 20______that people talk about themselves mainly because they like the way it feels. 第（19）题选______。

Science has now proved humans can’t help talking about themselves. It just feels too good. In a new study, Harvard University researchers conducted a series of experiments to 1______how much people liked talking about themselves and why. In one study, they scanned people’s brains 2______those people either revealed personal information about themselves or 3______the opinions of others. In another experiment, researchers tested whether people preferred to answer questions about themselves, other people or 4______facts—participants got differing levels of monetary compensation 5______on the question they chose. No matter the test, the researchers found the results pointed the same way: humans get a biochemical excitement from 6______. That’s 7______we spend almost 40% of conversation talking about ourselves, says the study—our brain chemistry 8______us to do it. In the first experiment, researchers found that sharing personal information led to 9______in the reward areas of the brain—the same ones that are 10______in response to rewards like food. Talking about other people did not 11______the circuits as much. In the second experiment, people were willing to 12______17% of their earnings in order to answer questions about themselves. The researchers also noted that people 13______enjoyed self-disclosure if they knew other people were listening. When people were given a choice to share their responses with others or to keep them 14______, they sacrificed 25% of their potential earnings in order to 15______the personal information. Previously, humans’ 16______for talking about themselves was thought to be caused by a desire for 17______with others, a way to open up to people and get them to trust us 18______in hopes of setting the foundation for friendship. 19______this appears to be the first study to 20______that people talk about themselves mainly because they like the way it feels. 第（20）题选______。