安全事件应急响应的阶段有()
A.抑制、根除阶段
B.恢复、跟进阶段
C.总结阶段
D.准备、检测阶段
参考答案:A, B, D
When his mother _____ , he felt very sad . Now when he thought of her _____,
he can't help crying.[ ]
A. died, died
B. died, death
C. death, death
D. death, died
Is it your first time ________ fireworks? [ ]
A. watching
B. watches
C. to watch
D. watch