课时作业(十六)　[必修4　Unit 1 Women of achievement] (限时：30分钟).完形填空 The answer is, they're probably not.

　　Traditional economics says that people are __1__ human beings who will lie if it's to their advantage. A recent university study has shown that, actually, we're pretty __2__—especially when we're at home.

　　Researchers in Germany __3__ people at home and asked them to toss(投掷) a coin. There was a strong __4__(刺激) to lie about the result: if the coin landed tails－up, the participants would receive money, while if the coin landed heads－up, they would get nothing. Because they were on the phone, they knew there was no __5__yet people told the__6__. Over hundreds of tosses, a coin will land tails－up about 50% of the time. In this__7__， over half the people asked said that the coin landed heads－up, which meant they would receive nothing.had found that people were more __8__. In those laboratory studies, 75% of people reported a __9__coin and asked for a reward. So the research team thinks it's being in our own homes that makes us play fair, although it's not yet clear why.

　　In fact both types of study show people are surprisingly __10__. Even in the laboratory, 25% of people __11__ a reward by telling the truth. The researchers say this is because honesty is __12__ valued in human society. We care about our __13__ and our sense of ourselves as decent(体面的) people. So lying has a psychological __14____15__．

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