The boys don’t know ___________.

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

D

解析試題分析：句意：這個(gè)男孩不知道怎么游泳�？崭裉幨琴e語(yǔ)部分。如果用疑問詞引導(dǎo)的賓語(yǔ)從句，應(yīng)用陳述句的語(yǔ)序，結(jié)構(gòu)是：疑問詞+主語(yǔ)+謂語(yǔ)動(dòng)詞；也可以用簡(jiǎn)單句形式，疑問詞+不定式，D項(xiàng)正確。A項(xiàng)不符合陳述句語(yǔ)序。故選D。
考點(diǎn)：考查疑問詞+不定式。

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