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Attention,please!Allthemobilephones
问题详情:Attention,please!Allthemobilephones______duringthemeeting.A.mustbekeptoff B.havekeptoff C.mustkeepoff【回答】A句意:在会议期间,所有的手机都必须关闭。主语和谓语动词有动宾关系,故使用被动语态。知识点:动...
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