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There are many people downstairs. What do you think _____? A

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There are many people downstairs. What do you think _____?
A.to happen B.happening
C.is happened D.has happened
There are many people downstairs. What do you think _____? A
D





点评: 注意现在完成时和一般过去时两种时态的区分

(1)一般过去时的谓语动词用过去式,而现在完成时的谓语基本构成是"助动词have /has +过去分词"。 (2)一般过去时通常与表示过去的时间状语连用。如:yesterday, last week, two years ago, just now, in 2002等; 而现在完成时则常与just, already, ever, never等副词和these days, this week, since..., for...等表示一段时间的状语连用。