53. ―________ you _________ the chief editor at the airport?

　 ―No. He _______ away before my arrival.

　　 A. Have; met; has driven　　　　　　 B. Had; met; was driven

　　 C. Did; meet; had been driven　　　　 D. Have; met; was driven

52. ―Did you meet Professor Johnson?

　 　―Yes, but when I arrived, he ________, so we only had time for a few words.

A. had just left　　　 　　　　　　　 B. has just left

C. was just leaving　 　　　　　　　 D. just left

51. ―Have you finished your composition already?

　 　―Yes. I _________ it in twenty minutes.

A. have finished　　 　　　　　　　 B. finished

C. will finish　　　　 　　　　　　 D. had finished

50. He traveled to many mountain villages and saw many poor children out of school. This experience _______ his life.

　　 A. would change　　 　　　　　　 B. had changed

C. was to change　　 　　　　　　　 D. was changing

49. You _______ things about. Look, what a mess in your room.

　　 A. always throw　　　　　　　　　 B. have always thrown

　　 C. are always throwing　　　　 　　 D. have always been throwing

48. ―You haven’t said a word about my new hair-style, Molly. Do you like it?

　 　―I’m sorry I ______ anything about it sooner. I certainly think it’s pretty.

　　 A. wasn’t saying　　 　　　　　　　 B. don’t say

C. won’t say　　　　 　　　　　　　 D. didn’t say

47. We plan to reach the North Pole in mid-July, and by then we _______ for six weeks.

　　 A. are walking　　　　　　　　　　　　 B. have been walking　

　　 C. will be walking　　　　　　　　 D. will have been walking

46. ―I guess you might have got lost there last Sunday.

　 　―Well, I_______.

　　 A. mostly did　　　 　　　　　　　 B. nearly had

C. almost had　　　 　　　　　　　 D. almost did

45. ―Hello! May I speak to Jack, please?

　 　―Yes, speaking.

　 　―Oh, I _________ your voice at first.

　　 A. don’t recognize　 　　　　　　　 B. didn’t

C. hadn’t recognized 　　　　　　　 D. haven’t recognized

44. Caunen Ferreira ______ up hope of finding her pet parrot, Raquel, who ______ from the back garden of her house two years ago.

　　 A. has given; was disappeared　　　　 B. has given; had disappeared

　　 C. had given; was disappeared　　　　 D. has given; disappeared