MustIwashdishesaftersupper?No,______.A.mustn'tB.don'thavetoC.don'tD.must
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题目内容：
Must I wash dishes after supper?No,______ .A.mustn't B.don't have to C.don't D.must
优质解答
must有两个否定形式：1.mustn't,表示“不许”,“禁止”
2.needn't =don't need to/don't have to/ haven't got to,表示“不必”
所以B
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