This kind of machines___in china.A.make B.are make C.are made D.is made

问题描述:

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