–May I smoke in the room?
--No, you______________. It’s a non-smoking room..
A．mightn’tB．won’tC．needn’tD．mustn’t
D
本題后半句的含義是此房間是無煙區(qū)，所以應該是不準抽煙在此房間抽煙，mustn’t表示不準的意思，故本題選D。
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