giúp mình với ạaaaaaaa A. have left B. leave C. left,35. For the last 20 years, we_____significant changes in the world of science and technology.,A. witness B. have witnessed C. witnessed D. are witnessing,36. My best friend Lan_____to England 10 years ago.,A. was moving B. moves C. moved D. has moved,37. Mr.Pike ____ for 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 I_____at 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, I_____English 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. We_____in silence when he suddenly____ me to help him.,A. walked - was asking B. were walking - asked,C. were walking - was asking D. walked - asked,42. By the time the software____onn se nett tonth,htho commpn_______mmmilllno o,developing it.,A. went - had spent B. will go - has spent,C. has gone - will spend D. goes - will have spent,43. When Carol____llst night, II____my favorite showwon teeevisso..,A. called /was watching B. had called /watched,C. called /have watched D. was calling /watched,44. Linda took great photos of butterflies while she_____in the forest.,A. was hiking B. is hiking C. hiked D. had hiked,45. When I_____for 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 price_____by 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, she_____a bath.,A. is having B. was having C. has had D. had had,48. John_____in 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

Question

giúp mình với ạaaaaaaa A. have left B. leave C. left,35. For the last 20 years, we_____significant changes in the world of science and technology.,A. witness B. have witnessed C. witnessed D. are witnessing,36. My best friend Lan_____to England 10 years ago.,A. was moving B. moves C. moved D. has moved,37. Mr.Pike ____ for 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 I_____at 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, I_____English 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&#x27;t answered his mobile. I hope nothing&#x27;s wrong.,A. I call B. I&#x27;ve been calling C. I&#x27;m calling D. called,41. We_____in silence when he suddenly____ me to help him.,A. walked - was asking B. were walking - asked,C. were walking - was asking D. walked - asked,42. By the time the software____onn se nett tonth,htho commpn_______mmmilllno o,developing it.,A. went - had spent B. will go - has spent,C. has gone - will spend D. goes - will have spent,43. When Carol____llst night, II____my favorite showwon teeevisso..,A. called /was watching B. had called /watched,C. called /have watched D. was calling /watched,44. Linda took great photos of butterflies while she_____in the forest.,A. was hiking B. is hiking C. hiked D. had hiked,45. When I_____for 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 price_____by 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, she_____a bath.,A. is having B. was having C. has had D. had had,48. John_____in 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

Timi · Accepted Answer

Here are the answers:

35. B. have witnessed
36. C. moved
37. C. has been working/retires
38. A. was waiting
39. B. had been studying
40. B. I&#x27;ve been calling
41. B. were walking - asked
42. A. went - had spent
43. A. called /was watching
44. A. was hiking
45. A. was waiting
46. B. has fallen
47. B. was having
48. D. has lived
49. B. left
50. B. has finished