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Something terrible _________ if he didn’t come to the bar as he always did.
A.should happenB.might happen
C.must have happenedD.can have happened
C

试题分析:考查情态动词+完成式的用法:句意:如果他没有象平常一样来到酒吧,那一定发生了可怕的事情。从句用的是过去时,说明应该用情态动词+完成式表示最过去事情的推测,排除AB。Must have done过去一定做了,can 用于推测一般用于否定和疑问句,选C。
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