问题
选择题
Safety in school has been of great concern because of the frequent reports ____ students got injured or killed while in school.
A．where
B．when
C．which
D．that
答案
答案：D
同位语从句that只起连接作用不做成分。由于频繁的报道学生在校受伤或被杀，学校安全受到人们的关注。选D