题目内容
一There's a sign "Be quiet" on the wall of the reading room.
一Yes. People talk loudly in public.
A. may not B. mustn't C. can't D. needn't
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题目内容
一There's a sign "Be quiet" on the wall of the reading room.
一Yes. People talk loudly in public.
A. may not B. mustn't C. can't D. needn't