91. Even if you leave the room only for a little while, please remember to turn off the lights.

49. I have collected lots of stamps, ____ were given by my friends.

48. When does the flight arrive in London? ________

47. Can you make it Monday next week? ________

46. I just called to confirm our appointment at 10 a.m. tomorrow. ________

45. I＇m afraid we have to change the appointment. I have something important to do. ________.

44. Excuse me, where is the nearest supermarket? ________

43. Is the shopping mall far from here? ________

42. Am I going in the wrong direction? ________

41.____ is known to all, Charles Dickens was a famous English writer.

40. She fell upon the steps and ____ tears.