问题 选择题

There are many people downstairs. What do you think ______?

A.to happen

B.happening

C.is happened

D.has happened

答案

答案:D

考查时态。句意“楼下有很多人,你觉得发生什么了?”happen不能用于被动语态;排除C;B项缺少is而不能构成现在进行时,排除B;不定式to do不能直接作谓语,排除A。故选D。

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