问题
选择题
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
答案
答案：C
题目分析：句意：人们不知道晚上发生了什么。本句时态是一般过去式，故排除D。happen表示突然发生，无被动。What happened?怎么了，发生了什么。这里what作宾语从句的主语。