people didn't know __during the night

people didn't know __during the night
people didn't know __during the night.
A:what was happened B:what the murder happened
C:what happened D:how the murder has happened
怎么选
要有理由哦
英语人气:994 ℃时间:2019-12-17 16:34:45
优质解答
d排除时态不对
happen没有被动a排除
选C
B中有事件murder不能加what排除
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