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外语
It is very kind of you to do the washing-up, but you ______ it.
It is very kind of you to do the washing-up, but you ______ it.
admin
2012-09-13
45
问题
It is very kind of you to do the washing-up, but you ______ it.
选项
A、mustn’t have done
B、shouldn’t have done
C、oughtn’t to have done
D、didn’t have to do
答案
D
解析
考查情态动词的用法。mustn’t have done没有这种形式,对过去的否定推测要用couldn’t have done来表示。shouldn’t have done表示“本不应该做而做了”;oughtn’t to have done表示“本不应该做而做了”,含有责备的意思,不符合题意。本句不需要用到虚拟语气,D正确。
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专业英语四级
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