秦朝郡县制适应了封建集权政治的需要，最主要是由于

A．郡县官吏必须对上一级负责

B．郡县是地方行政管理机构

C．郡县官吏与皇帝是臣与君的关系

D．郡县完全由中央和皇帝控制，官吏不能世袭

1.I can't find my books. They are________ (miss).

2.What's_______( happen) to them?

3.They were walking________ ( slowly) than us.

4.1 can hear someone______( cry) now.

5. Where have you______( be) ,Mr. Wang?

6.1 think he has_________( break) his leg.

7.He is     ( lie) on the ground.

8.We had better _______( get) you to the hospital.

9.They decide ______( go) and look for the little girl.