I
1. walk
2. worked
3. see
4. need
5. went / bought
6. bought
7. uses
8. is raining
9. has lived / lives
10. live
11. bought / haven't woren
12. eats / is eating
13. have you checked / have checked
14. has worked
15. see
16. go
17. have read
18. have just come
19. am
20. walked
16. walk
17. am studying
18. opens / closes
19. do you smoke
20. live
I. PASSIVE VOICE
1 - The office was painted
2 - A new motorway is being built
3 - The news on TV was being watched at 8 o'clock last night
4 - A man was arrested by a police this morning
5 - He hasn't been seen for three years
6 - His second tragedy has been finished
7 - The trees shouldn't be cut