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It is very kind of you to do the washing-up, but you    it.
A.mustn’t have doneB.wouldn’t have done
C.mightn’t have doneD.didn’t have to do
D
句意:洗了衣服你真是太好了,但是你没有洗的。mustn’t have done表达不对,wouldn’t have done 不会做的,mightn’t have done 不可能做,didn’t have to do没有必要做,根据语境应选D。
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