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

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