题目内容

----- 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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