PASSIVE-ACTIVE
1. Nam can repair this sewing machine
2. The police ought to put the robbers in prison
3. They had checked her handbad
4. Susan's father has promised her a new watch
5. You will answer all the questions on the paper
6. The earthquake has destroyed many buildings
7. He has killed a tiger
8. Mr.Lam must finish this work before June
9. We haven't seen Peter yet
10. Nam and Ba are painting the fence
11. Hoa reads a story book after dinner
12. They were building a new school here when we came. 
13. He will send his parents a gift. 
14. She has bought two new dresses recently. 
15. You must write these music lessons in ink. 
16. We saw our friends outside the church yesterday 
17. Lan saw an accident on Le Loi street yesterday. 
18. People can grow potatoes in this farm. 
19. I have seen that exciting film many times. 
20. My father drinks a cup of tea in the morning. 
21. Bill called his boss yesterday. 
22. Susan is phoning her boyfriend in the living room now 
23. Mr. and Mrs. Long were playing chess when we came. 
24. His parents have just given him a new dictionary. 
25. We grow rubber trees in our country. 
26. He met his father at the front gate. 
27. People can’t plant rubber trees in the desert. 
28. He will send his parents a gift. 
29. He gives her a novel about a love story