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--We________ in advance. Look, this restaurant is almost empty.

--Yes, just in case.

A. needn’t have booked B. mustn’t have booked

C. didn’t need to book D. couldn’t have booked

A

【解析】

试题分析:考查情态动词和虚拟语气。句意:--我们本来不需要提前预订的,看,这家饭店的顾客几乎寥寥无几。--是的,为了以防万一。情态动词+have done表示对过去的事情进行虚拟,needn’t have done本不必做某事;must have done一定已经做了某事,这时不能用must的否定形式,mustn’t不能表示推测;couldn’t have done不可能已经做了某事;根据句意可知,这里是“本不必”的意思,故选A。

考点:考查情态动词和虚拟语气

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