It was very kind of you to do the washing-up, but you _____ it.
A．needn’t doB．shouldn’t do
C．mustn’t have doneD．needn’t have done
D

試題分析：句意，你真好，幫我洗碗，但是你本沒有必要這樣做。needn’t have done “原本不必做的事卻做了”，故選D。
點(diǎn)評：情態(tài)動詞 + have done這是歷年高考熱點(diǎn)之一，可表示“推測、責(zé)備、懷疑”等多種意義。
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