It is in the library, you talk loudly. A. may notB. can’tC. needn’tD. mustn’t 答案: D ( 选择B的同学要注意中文的干扰.can’t表示不能够.) 查看更多

 

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It is in the library, you ______ talk loudly.
[     ]
A. may not
B. can't
C. needn't
D. mustn't

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