1. I'm very sorry _____ what I have done.

2. Miss White was very upset _____ the news of her father's death.

3. Don't you think you should try to be friendly _____ your classmates?

4. My daily expense are just about equal _____ my income.

5. We were very doubtful _____ his ability.

6. The gloves aren't very suitable _____ that kind of work.

7. She was sad because he was rude _____ her.

8. Thank you. You are kind _____ me.

9. Everybody was surprised _____ the news.

10. Are you excited _____ going on holiday next week?

11. This organization is quick _____ sending relief goods to the flooded areas.

12. When are you leaving _____ Singapore? This week or next week?

13. Can you help me, please? I can't see the differences _____ these words.

14. That house reminds me _____ the one where I used to live.

15. It was very kind _____ you to lend me the money I needed.

16. We have to apply effective measures to save many plant and animal species _____ extinction.

17. Clearing forests for timber has resulted _____ the loss of biodiversity.

18. She is looking _____ a new place to live because she does not want to depend _____ her parents any more.

19. Due to industrialization, we have to cope _____ the fact that many species are _____ danger _____ extinction.

20. Boys! Put your toys _____ It is time to go to bed. Don't stay _____ late.

21. She has suffered _____ her heart attack.

22. Most children are ill-prepared _____ employment.

23. English belongs _____ those who use it.

24. Four-fifths of the world's computers use programs _____ English.

25. My father insisted _____ building a new house.