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The flu is believed by viruses that like to reproduce in the cells inside the hu

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The flu is believed by viruses that like to reproduce in the cells inside the hu

The flu is believed _________ by viruses that like to reproduce in the cells inside the human nose and throat．

[]A．

causing

B．

being caused

C．

to be caused

D．

to have caused

试题答案

答案：C

解析：

本题将非谓语动词与被动语态综合考查，要注意两种句型：(1)It is believed that…(2)主语(人或物)be believed to do sth．

标签：likethattoinreproduce

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