21. In one year’s time, shefor this company for 15 years. A. will be working B. will have been working
C. will work D. has worked
22. His health has improved a lot since hedoing exercises regularly.
A. starts B. started C. has started D. had started
23. She hurt herself while shehide-and-seek with her friends.
A. is playing B. had played C. played D. was playing
24. .Whatat 9 o’clock last night? I phoned you but couldn’t get through to you.
A. did you do B. were you doing C. would you do D. had you done

25. It is raining heavily with rolls of thunder. Wesuch a terrible thunderstorm.
A. would never see B. had never seen C. have never seen D. never see
26. I my old teacher last week.
A. visited B. visit C. am visiting D. have visited
27. My brother usually me for help when he has any difficulties with his homework.
A. ask B. asks C. asked D. has asked
28. I all of my homework last night.
A. finish B. will finish C. have finished D. finished
29. Lan learning English a few years ago.
A. starts B. will start C. started D. is starting
30. Only after shefrom a severe illness did she realize the importance of good health.
A. would recover B. has recovered
C. had recovered D. was recovering
31. Only after the busfor a few miles did Jane realize she was on the wrong route.
A. was running B. had run C. has run D. runs
32. The childrento bed before their parents came home from work.
A. were all going B. had all gone C. had all been going D. have all gone
33. Paul noticed a job advertisement while healong the street.
A. was walking B. would walk C. walked D. had walked
34. I haven’t met him again since weschool ten years ago.
A. have left B. leave C. left D. had left
35. For the last 20 years, wesignificant changes in the world of science and technology.
A. witness B. have witnessed C. witnessed D. are witnessing
36. My best friend Lanto England 10 years ago.
A. was moving B. moves C. moved D. has moved
37. Mr. Pikefor this company for more than thirty years, and he intends to stay here until he.
A. worked/retires B. works/is retiring
C. has been working/retires D. is working/will retire
38. While Iat the bus stop, three buses went by in the opposite direction.
A. was waiting B. waited C. had waited D. were waiting
39. By the end of last March, IEnglish for five years.
A. had been studied B. had been studying
C. will have been studying D. will have studied
40. Alan for hours but he hasn’t answered his mobile. I hope nothing’s wrong.
A. I call B. I’ve been calling C. I’m calling D. called
41. Wein silence when he suddenlyme to help him.
A. walked - was asking B. were walking - asked
C. were walking - was asking D. walked - asked
42. By the time the softwareon sale next month, the company$2 million on developing it.
A. went - had spent B. will go - has spent
C. has gone - will spend D. goes - will have spent
43. When Carollast night, Imy favorite show on television.
A. called /was watching B. had called /watched
C. called /have watched D. was calling /watched
44. Linda took great photos of butterflies while shein the forest.
A. was hiking B. is hiking C. hiked D. had hiked
45. When Ifor my sister in front of the supermarket, a strange man came to talk with me.
A. was waiting B. waited C. had waited D. were waiting
46. Over the past 30 years, the average robot priceby half in real terms, and even further relative to labor costs.
A. is fallen B. has fallen C. were fallen D. have fallen

47. When I came to visit her last night, shea bath.
A. is having B. was having C. has had D. had had
48. Johnin the same house since he left school.
A. lived B. had lived C. was living D. has lived
49. Since Tom, I have heard nothing from him.
A. had left B. left C. has left D. was left
50. He will take the dog out for a walk as soon as he dinner.
A. finish B. has finished C. will finish D. finished