A. haveB. would haveC. had hadD. should have
47. I ______ you sooner had someone told me you were in the hospital.A. would have visitedB. visitedC. had visitedD. visit
48. ______ more help, I would call my neighbor.A. NeededB. Should I needC. I have neededD. I should need
49. ______ then what I know yesterday, I would have saved myself a lot of time and trouble over the years.A. Had I knownB. Did I knowC. If I knowD. If I would know
50. Do you think there would be less conflict in the world if all people ______ the same language?A. spokeB. speakC. had spokenD. will speak
51. If you can give me one good reason for your acting like this, ______this incident again.A. I will never mentionB. I never mentionC. will I never mentionD. I don’t mention
52. If I had known you were asleep, I ______ so much noise when I came in.A. didn’t makeB. wouldn’t have madeC. won’t makeD. don’t make
53. Unless you ______ all of my questions, I can’t do anything to help you.A. answeredB. answerC. would answerD. are answering
54. Had you told me that this was going to happen, I ____________ it.A. would have never believedB. don’t believeC. hadn’t believedD. can’t believe
55. If Jake ______ to go on the trip, would you have gone?A. doesn’t agreeB. didn’t agreeC. hadn’t agreedD. wouldn’t agree
56. Jane: “John went to the hospital alone”,Katy: “If ______, I would have gone with him”.A. had he told meB. he had told meC. he has told meD. he would tell me
57. If you ______, I would have brought my friends over to your house yesterday to watch T.V, but I didn’t want to bother you.A. had studiedB. studiedC. hadn’t studiedD. didn’t study
58. Peter: “Did you need help with your Math last night?”Mary: “If I had needed, I ______ you".A. would callB. calledC. would have calledD. will call
59. If someone ______ into the store, smile and say, “May I help you?”A. comesB. cameC. comeD. should come
60. “Here’s my phone number”.“Thanks. I’ll give you a call if I ______ some help tomorrow”A. will needB. needC. would needD. needed
61. If I didn’t work for an accounting firm, I ______ in a bank now.A. workB. will workC. have workedD. would work
62. The death rate would decrease if hygienic conditions ______ improved.A. wasB. isC. wereD. had been
63. The education in Japan ______ if the basic principles of education had not been taken into consideration.A. would go downB. would have gone downC. went downD. had gone down
64. If there ______, the rice fields could have been more productive.A. had been enough waterB. were enough waterC. would be enough waterD. are enough water
65. The patient will not recover unless he ______ an operation.A. had undergoneB. would undergoC. undergoesD. was undergoing
66. If she ______ him, she would be very happy.A. would meetB. will meetC. metD. should meet
67. If he ______ a thorough knowledge of English, he could have applied for this post.A. had hadB. hadC. hasD. has had
68. If I had enough money, I ______ abroad to improve my English.A. will goB. would goC. wentD. should have go to
69. The bench would collapse if they ______ on it.A. stoodB. standC. standingD. stands
70. If it ______ convenient, let’s go out for a drink tonight.A. beB. isC. wasD. were
VI. Complete the sentences, using the correct form of the words in brackets. 71. People believe that the ____________ water has brought cancer to the local residents. (pollute) 72. Light pollution make us ____________ to see the stars in the sky. (able) 73. Noise is considered as ____________ pollution. (environment) 74. ____________ habitats have been destroyed in recent years. (nature) 75. A number of cleaning products contain ____________ chemicals. (harm) 76. Water samples collected at these villages were seriously ____________with bacteria. (contaminate) 77. An ____________ of agrochemicals is pesticides. (illustrate) 78. Contaminants are usually ____________ to aquatic plants. (poison) VII. Fill in each blank with the correct preposition. 79. Land pollution is responsible for damage done ____________ natural habitat of animals. 80. Americans throw ____________ twenty-eight and a half million tons of plastic in landfills every year. 81. Scientists have come up ____________ new ways of saving energy. 82. Thousands of people were exposed ____________ radiation when the nuclear plant exploded. 83. Waste water from many factories which is dumped ____________ water bodies directly causes water pollution.