用所给单词的适当形式填空。

1. You are in poor health and you must give up _____. (smoke)

2. You should do more _____ (exercise). Don't always sit at the desk busy doing your _____. (exercise)

3. We all love Miss Yang. She always makes her history class very_____. (interest)

4. Foreign stamps _____ him. (interest)

5. Her parents wouldn't allow her to marry anyone _____ family was poor.(who)

6. When their car becomes old, they prefer_____ (buy) a new one rather than _____ (repair) it.

7. I prefer _____ (do) exercise to _____ (watch) TV.

8. His mother refused _____ (buy) him a present.

9. He is sure to come. I've_____ (persuade) him to attend our meeting.

10. I tried to persuade him _____ (give) up _____ (smoke), but failed.