根据答句写问句。

1. —               ______________________________

    — He is playing basketball.

2. —         _________________________________

    — My sister is at home.

3. —           _________________________________

    — We are going to go to school at eight o'clock.

4. —           _________________________________

    — I want a sweater.

5. —           _________________________________

    — I am going to watch TV

冷沉淀的用量。（）

A.1~2u/10kg体重。

B.1~1.5u/5~7kg体重。

C.1u/5~7kg体重。

D.1~1.5u/10kg体重。