问题

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

正确答案是：

同类题型

Uncle Martin held a yard sale. But ______ one came because the weather was so bad.

What does your father do—____

Good news! The price of all those second-hand goods is______ before.

I want to change my desk It _______toomuch room

The teacher told us to do_______ he did.