1. 用方框中所给短语的适当形式填空

stay in touch    laugh at   try one's best   give up   wake up

1. （1） They all to study hard in order to go to college．

3. （2） My father was ill．At last he had to  smoking．

5. （3） It is time to get up．Please your sister．

7. （4） It is impolite to the people who are blind or deaf．

9. （5） Tom with his parents by email．