Safetyinschoolhasbeenofgreatconcernbecauseoffrequentre...

問題詳情：

 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考查定語從句的關係詞。此處accident為先行詞，其在定語從句中作狀語，相當於in the accident。

知識點：定語從句

題型：選擇題