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----- I want to know if I _________ smoke here.
----- No, you ___________. Can’t you see the sign “NO SMOKING” there?
A.shall; won’tB.may; mustn’tC.can; needn’tD.must; can’t
B
在if 引导的宾语从句中,从句时态要根据自己本身内容时态决定,mustn’t表示禁止的意思,故选B
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