英语题.急求!希望能解释详细.It was very kind of you to do the washing-up, but you ___ it.A.mustn't have done B.wouldn't have doneC.mightn't have done D.didn't have done

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英语题.急求!希望能解释详细.It was very kind of you to do the washing-up, but you ___ it.A.mustn't have done B.wouldn't have doneC.mightn't have done D.didn't have done
英语题.急求!希望能解释详细.
It was very kind of you to do the washing-up, but you ___ it.
A.mustn't have done B.wouldn't have done
C.mightn't have done D.didn't have done

英语题.急求!希望能解释详细.It was very kind of you to do the washing-up, but you ___ it.A.mustn't have done B.wouldn't have doneC.mightn't have done D.didn't have done
A好像不太对吧?mustn't表示禁止
我觉得像是C “本可以不必做”

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