c
happen的主语是事,故A,B都错了;happen 没有被动语态,D错.
they don't know what ————yesterday
they don't know what ————yesterday
A.did he happen B.he happened C.happened to him
D.was happened to him
A.did he happen B.he happened C.happened to him
D.was happened to him
英语人气:393 ℃时间:2020-01-01 23:52:11
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