Safetyinschoolhasbeenofgreatconcernbecauseoffrequentre...

问题详情：

 Safety in school has been of great concern because of frequent reports about accidents _______ students got injured or killed while in school .

    A. that        B. when      C. in which   D. for which

【回答】

C考查定语从句的关系词。此处accident为先行词，其在定语从句中作状语，相当于in the accident。

知识点：定语从句

题型：选择题