Trần Khánh Linh

change the following sentences in pasive voice 
1. They were painting a house 
2. She is watering those flowers 
3. We had finished our reports in three months 
4. He ought to sell that car 
5. We have seen her at the station 
6. The librarian will give students the books 
7. He showed me the way to Thames River 
8. He was learning in his room ay 8.30 yesterday
9. You can buy me an envelope
10. We have just bought a car 
11. They visited the church two years ago 
12. Mrs.Green is cooking the food in the kitchen
13. I can't do these exercises quickly 
14. She had finished the reprt by noon
15. The movie has disappointed us very much 
16. They have to pay the bill before the first of the month 
17. Must we finish the test before ten ?
18. How do people make candles  ?
19. Where will your company send you next year ?
20. Has he slept this word wrongly ?
21. Há anyone ever asked you for your opinion ?
22. Did her story take them in ?
23. Should they help Jane with the sewing ?
24. Do you solve this problem ? 
25. Did your mother make some cakes ?
26. When have you done these exercises ?
27. Who gave you this knife ?
28. What did you do last night ?
29. He used to cut grasses in the morning