You ________ her in her office last Friday; she' s been out of town for two weeks.

A．needn' t have seen

B．must have seen

C．might have seen

D．can' t have seen

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参考答案

答案解析

考查情态动词。
句意：在上周五你不可能在她的办公室看见她，她离开本市已经两星期了。needn’t have done表示不必做某事，而实际上已经做了，含没有必要或浪费的意思。根据该题后半句的意思判断A项错。B项和c项是对发生在过去的事情的一种推断，只是程度不同，因为是肯定形式，不合题意，错误。must have been的否定形式应为can’t have done，所以D正确。

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