一定要正确答案 最好能说明原因
问题描述：
一定要正确答案 最好能说明原因
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
答
选C,A的happen不能用被动.BD语法错了,可改为what the murder has happened