B．that; which C．that; that

　　D．which; whereCars play an important role in modern life, but they_______also cause many problems like air pollution．

　　A．should

　　B．can

　　C．must

　　D．will完形填空 阅读下面短文，掌握其大意，然后从各题所给的四个选项选出最佳选项。

　　A recent study shows that gossip（流言蜚语）is more powerful than truth．It suggests people believe what they hear through the grapevine（小道消息）__36__they have evidence to the contrary． Researchers, __37__students using a computer game, also found gossip played an important role when people __38__ decisions．"We show that gossip has a strong __39__, even when people have __40__ to the original information as well as gossip about the same information．Thus, it is

　　that gossip has a strong controlling potential," said Ralf Sommerfeld, who led the study．

　　In the study, the researchers __42__ the students money and allowed them to give it to others in a series of rounds．The students also wrote

　　about how others played the game that everyone could review．Students tended to give

　　money to people described as “scrooges （吝啬鬼” and more to those described as “__45__ players”．“People only believed the gossip, not the past decisions," Sommerfeld said in a telephone interview．

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