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School safety has set off alarm bells with frequent serious accidents　　 students got injured or even killed.

A. that　　　　　 B. in which　　　　 C. by which　　　　 D. when

35. The national Education Department says school safety has set off alarm bells with frequent serious accidents_________students got injured or even killed.

The National Education Department says school safety has set off alarm bells with frequent serious accidents _______ students got injured or even killed.

A. that　　　　　 B. in which　　　　 C. by which　　　　 D. when

The national Education Department says school safety has set off alarm bells with frequent serious accidents _______students got injured or even killed.

　　 A. that　　　　　　 B. in which　 C. by which　 D．when

35. The national Education Department says school safety has set off alarm bells with frequent serious accidents_________students got injured or even killed.

     A. that             B. in which   C. by which   D．When\

The National Education Department says school safety has set off alarm bells with frequent serious accidents _______ students got injured or even killed.

A. that　　　　　 B. in which　　　　 C. by which　　　　 D. when

35. The national Education Department says school safety has set off alarm bells with frequent serious accidents_________students got injured or even killed.