49. “Don’t open your books,” the teacher said to us.

48.　　 “May I borrow your pen.” he said.

47.　　 “Would you please open the window” he said.

46. “Please turn off the lights when you leave the classroom.” the teacher said to him.

45. “Please don’t leave me.” she said to him.

44. “Please open your book .” the teacher said.

43. He told him not to touch anything.

42. His parents told him not to laugh at others.

41. The teacher told the students not to sleep in class.

40. “Don’t sleep in class.” the teacher said to the students.