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4. The Effel Tower was built in 1889.
5. He is being questioned at their headquaters by the police.
6. A nice gift was sent to me on my birthday by him.
7. Rice is grown in tropical countries.
8. A new car will be bought by my father next month.
9. This room is cleaned everyday.
10. Her homework hasn't been done yet.
11. You will be told what time the train leaves by my sisters.
12. Some friends of hers have been asked to join us.
13. It was declared that she won the competition.
14. He is thought to have died a natural death.
15. The president was reported to have suffered a heart attack.
16. It is believed that 13 is an unlucky number.
17. They are being watched to work by the teacher.

18. Peter hasn't been seen since the day of the party.
19. The suspects were being followed by the police.
20. An apple a day is thought to be good for you.
21. All the schools have to be improved in the city.
22. A new bridge is going to be built in the area.
23. Two department stores have been built this year.
24. Trees are being planted in the schoolyard by the students at the moment.
25. Their car was being washed when I came.
26. The floor is being cleaned by her now.
27. Our homework has just been finished.
28. This problem can't be solved.
29. Jeans are sold all over the world.
30. I was gien a new skirt by my mother.