题目内容
【题目】一I think I saw Mr. Smith at yesterday's party.
一He ______ there. He is now on a business trip in Greece. And he left the day before yesterday.
A. mustn't have been B. couldn't have been
C. might not be D. should not be
【答案】B
【解析】考查情态动词表推测。句意:——我想我昨天在聚会上看到史密斯先生了。——他不可能在那里。他现在正在希腊出差,前天就走了。couldn't+have+done表示对过去事情的否定推测,译成“不可能做过某事”。故选B。
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