21.This French book be Mary′s.She is learning English but not French. A.mustn′t B.needn′t C.mightn′t D.can′t 查看更多

 

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This French book_______ be Mary′s.She is learning English but not French.

A.mustn′t    B.needn′t       C.mightn′t         D.can′t

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