1. 用方框中所给短语的适当形式填空

at the same time   depend on  stay in touch with  fill out   prefer to

1. （1） We have many forms of this kind these years．

3. （2） Though we haven't seen each other for a long time，we still each other often．

5. （3） I study French in Paris and I make money by working for a restaurant．

7. （4） Betty  singing dancing．

9. （5） The old man  his youngest son．