30. The plants ought to be watered once a week.

31. The mail is being delivered by the mailman now.

32. My briefcase has been taken.

33. He was ordered to take a long rest by the doctor.

34. The house was struck by the lightning.

35. An article was written about our country.

36. That novel has been translated into Vietnamese.

37. The gifts were divided by the visitor among the children.

38. The mail is opened by my secretary every morning.

39. A new book will be published.

40. We were treated very kindly by the host.

41. The report will be written for me by my wife.

42. He has been transfered to another class by his teacher.

43. Dogs must be kept in the garden.

44. The fire was started by a stranger.

45. The book will be publishes next year.