【题目】---- It’s a pity that Mr. Smith died last night.
---- Really? The police may never discover what ______ that night, for he was the only eyewitness (目击者).
A. happened B. took place
C. was happened D. was taken place
在线课程【答案】A
【解析】考查动词
首先排除“C"和”D"用法不对,这两个“发生“都没有被动语态.而"take place"是有目的有计划的发生. happen偶然的发生，由语境可知A。