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The boys don’t know ___________.

A.how do they swim B.how swim
C.they how swimD.how to swim

D

解析试题分析:句意:这个男孩不知道怎么游泳。空格处是宾语部分。如果用疑问词引导的宾语从句,应用陈述句的语序,结构是:疑问词+主语+谓语动词;也可以用简单句形式,疑问词+不定式,D项正确。A项不符合陈述句语序。故选D。
考点:考查疑问词+不定式。

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