1.the machine can be shownto the public next month

2.the litter girl will be looked after carefully when her mother goes out

3.i was told to do more exercises at home by my teacher

4.their lessons are being written in the room 15 by my friends

5.magazines were being read last night when it started to rain

6.his lessons isn't prepared well before class by peter

7.that television was bought by my father two weeks ago

8.an art exhibition will be organized by their school next month

9.the plants ought to be watered everyday

10.mary'car is being repaired in the yard by mr brown at he moment

11.our environment is polluted more and moreseriously by chemical wastes

12.we were given this watch by our mother two days ago

13.a book is going to be written about children by kim

14.this soup should be served when it is still hot

15.the tet holiday will be celerbrated by millions of VN people next month

16.dinner was being cooked by her mothe when the postman came

17.our house is being painted at the moment 

18.i was introduced to dr felix by mr pike last year

19.are clean towels provided by the hotel?

20.a scholarship has just been won by his son

=>
1. The meeting can be showed to the public next month.
2. The little girl will be looked after carefully by Mary when her mother goes out.
3. I was told to do more exercises at home by the teacher.
4. Their lessons are being written in the room 15 by my friends.
5. Magazines were being read by us last night when it started to rain.
6. Peter's lessons aren't prepared well before class.
7. That television was bought by my father two weeks ago.
8. An art exhibition will be organized by their school next month.
9. The plants ought to be watered everyday.
10. Mary's car is being repaired in the yard by Mr.Brown at the moment.
11. Our environment is polluted more and more seriously by Chemical wastes.
12. This watch was given to us by our mother two days ago.
13. A book about children is going to be written by Kim.
14. This soup should be served when it is still hot. 
15. The Tet holiday will be celebrated by millions of Vietnamese people next month.
16. Dinner was being cooked by her mother when the postman came.
17. Our house is being painted at the moment.
18. I was introduced to Dr.Felix by Mr.Pike last year.
19. Are clean towels provided by the hotel?
20. A scholarship has just been won by his son.
21. My homework was being done at ten o'clock last night when the light went out.
22. AngKor Wat was built around the year 00 to honor a Hindu God. 
23. That house was built five years ago.
24. A lot of flowers were bought for her mother.
25. All the vegetables and meat are eaten by the children.
26. Lien's homework wasn't finished by her.
27. Ba's bike can be fixed by himself.

28. These books were written for the children by him. 
29. This cloth bag is used again and again.
30. Your lesson isn't prepared before you go to school.
31. A lot of tourists are attracted by Ha Long Bay.
32. A new bike will be bought for Minh on his birthday by Mr.Hung.
33. A car was rented by Vinh last week.
34. A test is done well by Mai.
35. I am given mark 10 for my English test by the teacher.
36. The floor is cleaned by my mother everyday.
37. The dog is usually fed by Mrs.Lan.

Ex2/
1. I am brought this dish by the waiter.
2. These postcard are sent to us by our friends.
3. They were told this story by their grandmother when they visited her last week.
4. This train ticket was ordered for Tim's mother.