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. that
B. when
C. which
D. what
答案
答案：A
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Safety in school has been of great concern because of the frequent reports ________ students got
injured or killed while in school. [ ]
A. that
B. when
C. which
D. what
答案：A