【题目】Safety in school has been of great concern because of the frequent reports ______ students got injured or killed while staying in school.
A．where B．when C．which D．that
在线课程【答案】D
【解析】句意：学校安全已经引起极大的关注因为有频繁的报道学生在学校期间受伤或被杀。空缺处连同后面的句子是同位语从句，解释说明reports的内容，空缺处在同位语从句中不作成分，无词义，故选D项。