Exercise 2:  Fill in each blank with one suitable preposition.
1. She is keen ....................... cooking.
2. Are you afraid....................... swimming....................... the sea?
3. He is interested....................... listening ....................... music.
4. I am very bad....................... speaking English.
5. We are good ....................... repairing things.
6. She isn’t fond....................... reading books.
7. We got tired....................... waiting....................... them.
8. You should give ....................... smoking.
9. Smoking is very harmful....................... health.
10. Do you have any difficulty....................... listening....................... English dialogues?
11. They spend much time looking....................... a job.
12. He’s talking ....................... giving....................... his job.
13. We should stop children .................. smoking as it’s harmful ...................their health.
14. I am tired....................... asking him ....................... help.
15. My father prefers tea ....................... coffee. 
16. I can’t stand seeing her ....................... home all day.
17. Children are fond ....................... watching films ....................... TV
18. We had difficulty....................... looking ....................... your house.
19. I used ....................... play video games.
20. Children prefer playing ....................... learning.