--It's a pity that Mr.Smith died last night.
问题描述：
--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.
A.happened B.took place C.was happened D.was took place
答
选第一个“happened”吧!
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 piace"是有目的有计划的发生.所以我感觉”a“正确