Question

【题目】 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

Answer 1

【答案】C

【解析】

试题分析：句意：人们不知道在夜晚发生了什么事情。根据语法知识，此处know后面是一个宾语从句，语序要用陈述语序；时态要与主句的时态保持一致，即要用过去的某种时态；结合happen没有被动语态，其用法为sth. happen。B中不缺少主语和宾语，所以不能用what，故选C。