When an automatic washing machine__,water goes in.A.is switches
问题描述：
When an automatic washing machine__,water goes in.A.is switches
When an automatic washing machine__________,water goes in.A.is switchesB.is switchingC.switshes onD.is switched on
为什么是D
答
因为主语不是人,所以要用be+动词被动(+ed)的结构,符合的只有D