问题: ENGLISH
--Could you tell me whom the radio_____by?
__Sorry, I have no idea.
A.invents
B.invented
C.is invented
D.was invented
解答:
选D.
把whom放回后面就变成Could you tell me (that)the radio was invented by whom?
"whom"在这里作宾格,录音机已经被发明使用了,所以用一般过去时.
这里是"that"引导的宾语从句,从句中物作主语,所以用被动语态.
选B的话从句就缺少谓语了.
AC都可排除.
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