There are so many people over there.What ________?Maybe there's a traffic accident.选B 其他三个不
能选的理由 是什么 A.happens B.is happening C.is happened D.was happened
人气：183 ℃ 时间：2019-12-09 00:18:39
解答
There are so many people over there.What ________? Maybe there's a traffic accident.
根据语境选B,前\后面句都是现在时,后句更是推测,所以现在正发生什么事是推测的内容.
C.D 被动语态不可能这样用的 A是一般现在时也不能用在happen
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