10-They grow rubber in Lam Dong. 11- The zoo keepers feed the lions at 3 p.m every day. 12- My mother feeds the chickens three times a day. 13- Sally's parents gave her a microcomputer for her birthday. 14- John has written many interesting books 15- They built the garage at the same time as the house. 16- I bought this pen in Japan last year. 17- We have done all our homework. 18- They milk the cows twice a day. 19- A child can understand the problem. 20- They clean this street once a day. 21-They have finished the work. 22-Mark has sold many famous pictures. 23- They consider English the most international of languages. 24- Marry will get that job soon. 25- Many women are now taking important positions. 26- He had built his house before you came here. 27- To get high marks, you have to do more exercises. 28-Can you cut the grass? 29- Burning garbage may pollute the air.

41- David wrote the report for the accident. 43-Have you washed the dishes yet? 42- Will they build a new hospital here?

10-They grow rubber in Lam Dong. 11- The zoo keepers feed the lions at 3 p.m every day. 12- My mother feeds the chickens three times a day. 13- Sally's parents gave her a microcomputer for her birthday. 14- John has written many interesting books 15- They built the garage at the same time as the house. 16- I bought this pen in Japan last year. 17- We have done all our homework. 18- They milk the cows twice a day. 19- A child can understand the problem. 20- They clean this street once a day. 21- They have finished the work. 22-Mark has sold many famous pictures. 23- They consider English the most international of languages. 24- Marry will get that job soon. 25- Many women are now taking important positions. 26- He had built his house before you came here. 27- To get high marks, you have to do more exercises. 28- Can you cut the grass? 29-Burning garbage may pollute the air. 30- You have to finish all these exercises.

1- David has written the report for the accident. 2- They built a big hospital in this town last years 3- They will post our letters when the ship arrives at the next port. 4- They grew many big trees in this street last year. 5- They haven't cleaned the street this week. 6- I can do all these exercises. 7-No one signed this cheque. 8- John is painting a big picture about this town 9- He couldn't repair the broken vase.

chuyển những câu này sang dạng bị động