havetoAm的知识精选

—Mustthestudentsleavehereatonce?—No,they     haveto.A.m...
问题详情:—Mustthestudentsleavehereatonce?—No,they     haveto.A.mustn’t      B.can’t           C.donot    D.needn’t【回答】C知识点:情态动词题型:选择题...
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