— Must I come back in a week?— Oh,no,you ____.A.don't B.mustn't C.don't have to D.can't

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— Must I come back in a week?— Oh,no,you ____.A.don't B.mustn't C.don't have to D.can't
— Must I come back in a week?— Oh,no,you ____.A.don't B.mustn't C.don't have to D.can't

— Must I come back in a week?— Oh,no,you ____.A.don't B.mustn't C.don't have to D.can't
选C,must应该用needn't或者don't have to来否定

选c,
不选b因为它的意思是不准。