用适当的介词或副词填空。

1. Though Zhang Guoli is a bit ill, he goes to work instead ______ staying at home.

2. The parents allowed their children to stay ______for their favorite program.

3. It is necessary to clean______ your desk every day.

4. —Mom, I think I'm well enough to go back to school.

    —Not really, my dear. You'd better stay ______ home for another day.

5. I think teenagers should be allowed to go______ with their friends on weekends.

按照我国现行证券交易规则，（）不可能是证券交易竞价的结果。

A.全部成交

B.部分成交

C.不成交

D.推迟成交