This kind of machines___in china.A.make B.are make C.are made D.is made为什么要选择D 帮我解析

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This kind of machines___in china.A.make B.are make C.are made D.is made为什么要选择D 帮我解析
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This kind of machines___in china.A.make B.are make C.are made D.is made为什么要选择D 帮我解析
This kind of machines___in china.A.make B.are make C.are made D.is made
为什么要选择D 帮我解析

This kind of machines___in china.A.make B.are make C.are made D.is made为什么要选择D 帮我解析
因为“this kind of + 名词”后面的谓语动词要用单数,所以排除BC
因为这句话是被动,所以选D

主语的核心词是kind 是单数。所以选is
如果改为These machines of that kind ___....
就填are
因为此时主语的核心词是machines