题目内容：

must的否定怎么看?
eg:
A:We always get home late for supper.
B:You're right.So we ( ) be late this time.
A.needn't B.mustn't C.don't need to D.don't have to

优质解答

用mustn't
我们老师说的,不是否定回答（用needn't）