You __________ all those calculations! We have a computer to do that sort of ...

作者: tihaiku 人气: - 评论: 0
问题 You __________ all those calculations! We have a computer to do that sort of thing.
选项 A.needn't have done B.must not have done C.shouldn' t have done D.can not have done
答案 A
解析 考查情态动词。needn’thave done sth.意为“本不必做某事,但实际上做了”,没有must nothave done sth.这种否定推测的表达方式,shouldn’t have done sth.意为“不该做某事但做了”,can not have donesth.意为“不可能做某事”,句意为“你本不必做那些计算,那些事情可由我们的电脑来做”。故选A。

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