1. Some large cities may have to ban cars _____ the city center to wipe out smoke.

2. When she arrived in Britain, she wasn't used to driving _____ the left.

3. Our flat is _____ the second floor of the building.

4. Did you go on holiday _____ yourself?

5. They have been waiting _____ the bus for half an hour.

6. She intended to quit her job to stay _____ home and look _____ her sick mother.

7. He is very worried _____ his new job because he is not quite prepared _____ working.

8. Instead _____ petrol, cars will only run _____ solar energy and electricity.

19. She has a promising future ahead _____ her.

10. If you have ever watched television, you have seen plenty _____ drug advertisements.

11. According _____ Bill, there's something wrong _____ my computer.

12. I'm terrified _____ breaking down on a motorway at night.

13. Today, women are increasingly involved _____ the politics.

14. Do you have any objections _____ this new road scheme?

15. As an adult, I am independent _____ my parents financially.

16. As I was _____ of the change in the program, I arrived half an hour late for the rehearsal.

17. May I introduce you _____ Mrs Brown?

18. She likes reading books _____ the library.

19. Many students aren't keen _____ their study at school.

20. Please write your answers _____ ink.

21. Bread is usually made _____ wheat.

22. Education in many countries is compulsory _____ the age of 16.

23. Lack _____ food had stunted his growth.

24. Family members who live apart try to get together _____ Tet.

25. On Christmas Eve children go to bed full _____ excitement.