将下列句子重新排序，组成一段通顺的对话。将序号写在下面的横线上，B、E已给出。(每空1分，共5分)

A. I’ll study hard, Mum. But can I watch one more show, then go to bed?

B. It’s time for bed, Jim.

C. Oh, I forgot the exams.

D. But I don’t want to sleep, Mum. Can I watch more TV?

E. No, now is bedtime.

F. No, it’s 11 o’clock. You have exams tomorrow.

G. You should study hard, Jim. You are not good at all the subjects.

小题1:_______ 小题2:_______ 小题3:_______ 小题4:_______ 小题5:_______

我国劳动卫生标准采用（）

A.时间加权平均浓度

B.阈限值

C.最高容许浓度（MAC）

D.容许接触水平

E.个体接触水平