I didn`t know __________ because it was dark.A)what`s happenedB)w_英语解答

I didn`t know __________ because it was dark.
A)what`s happened
B)what was happened
C)what had happened
D)happened what
选什么?为什么?

人气：249 ℃　时间：2020-05-19 05:27:19

解答

c
1.happen没有被动语态 B错误
2.前面有did,所以happen用过去的过去.选c