Safety in school has been of great concern (关注) because of recent reports about

题干

Safety in school has been of great concern (关注) because of recent reports about accidents _____ students got injured or killed at school.

A．for which

B．when

C．which

D．in which

上一题下一题 0.85难度单项选择更新时间:2010-11-17 02:15:41

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