53. She __________the painting when I came. A. painted B. has been painting C. was painting D. has painted 54. When I was a boy, I _____________tea to coffee. A. preferred B. was preferring C. have preferred D. prefer 55. I _____________swim in this river when I was young. A. was used to B. am used to C. used to D. use to 56. She came into the room while they ______________television. A. are watching B. were watching C. watched D. have watched 57. It's an hour since he ____________, so he must be at the office now. A. is leaving B. was leaving C. has left D. left 58. He __________up his mind yet. A. hasn't made B. didn't make C. wasn't making D. wasn't make 59. My teacher arrived after I __________________for him for ten minutes. A. was waiting B. had waited C. waited D. have waited 60. By the end of next year, George ___________English for two years. A. will learn B. will have learned C. would learn D. has learned 61. The children are still ill but they __________better gradually. A. getting B. get C. are getting D. are got 62. Tom and Mary _________for Vietnam tomorrow. A. have left B. leaving C. leave D. are leaving 63. I _______this film twice. A. have seen B. will see C. saw D. see 64. -Peter, please help me do the washing up. - Sorry, Mum. I ______ TV. A. had watched B. am watching C. watched D. watch 65. The farmers _____ in the field now. A. are working B. were working C. worked D. have worked 66. The war _____ out three years ago. A. broke B. was breaking C. has broken D. had broken 67. He ______ a cup of coffee every morning. A. drinks B. has drunk C. drank D. is drinking 68. She ______ a lot of new books. A. has just bought B. had just bought C. bought D. buys 69. Up to the present, Nam_____ good work in his class. A. did B. has done C. does D. had done 70. At present, that author ______ a historical novel. A. is writing B. had written C. has written D. was writing