16. His term paper should be typed by him.
17. The plant ought to be planted once a week.
18. It has to be finished by him today.
19. The bill may be paid for us by him.
20. They must be warned of the danger.
21. This work has to be finished by me.
22. The report has been finished by Beth.
23. The meeting has been cancelled.
24. He has been given a lot of money by someone.
25. This house has been built by my father since 2005.
26. Were posted yesterday.
27. Are sent to Nha Trang by train.
28. Is played in the school yard by my sister and me everyday.
29. Will be built in that area next year.
30. Has been bought by Nam's father.
31. Apples were eaten by Lan last night.
cho mình xin ctlhn nhé
