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VIII. Fill in each blank with the correct preposition. 1. Land pollution is responsible for damage done natural habitat of animals. 2. Americans throw twenty-eight and a half million tons of plastic in landfills every year. 3. Scientists have come up new ways of saving energy. 4. Thousands of people were exposed radiation when the nuclear plant exploded. 5. Waste water from many factories which is dumped water bodies directly causes water pollution. IX. Read the passage and complete the sentences. True (T) or false (F). Air pollution is a serious problem in many cities. Motor vehicles, factories and other sources create so much air pollution that it may hang in the air like dirty fog. Air pollution threatens the health of the people who live in cities. City wastes cause water pollution when they are poured into the waterways. These wastes kill fish and make some areas unfit for swimming. In addition, many large cities have difficulties in disposing of their garbage. The amount of garbage grows each year, but places to put it are quickly filling up. Citizens, governments, industries, scientists, and business people must work together in different ways to gradually reduce pollution. For example, most cities have introduced recycling programmes. ¨ 1. Motor vehicles and factories are among some sources of air pollution. ¨ 2. Air pollution doesn’t endanger people’s health in some cities. ¨ 3. Air pollution is the only problem of the environment mentioned in this passage. ¨ 4. Garbage disposal is a problem in many large cities. ¨ 5. Everyone must cooperate to reduce pollution. ¨ 6. We can reduce pollution by recycling programmes only. X. Choose the word or phrase among A, B, C or D that best fits the blank space in the following passage. Light pollution is not (1) serious as water or air pollution. (2) , it is the type of pollution that (3) more in cities than in rural areas. In the past, we could sit out at night and (4) at glittering stars in the sky and light from objects in the outer space. Nowadays, cities are covered with lights from buildings, streets, advertising displays, many of which direct the lights up into the sky and into many unwanted places. The real problem is that it is very (5) to apply light to almost everything at night. Millions of tons of oil and coal (6) to produce the power to light the sky. Eye strain, (7) of vision and stress are what people may get from light pollution. (8) light at night can harm our eyes and also harm the hormones that help us to see things properly. 1. A. as B. more C. much D. only 2. A. Moreover B. However C. Therefore D. Nevertheless 3. A. happen B. occur C. occurs D. is occurred 4. A. watch B. see C. spend D. gaze 5. A. waste B. wasteful C. wasting D. wastes 6. A. used B. using C. is used D. are used 7. A. lose B. lost C. loss D. losing 8. A. Very much B. Too much C. Too many D. So many XI. Read the following passage and then answer the questions below it. Air pollution is a cause of ill-health in human beings. In a lot of countries there are laws limiting the amount of smoke which factories can produce. Although there isn’t enough information on the effects of smoke in the atmosphere, doctors have proved that air pollution causes lung diseases. The gases from the exhausts of cars have also increased air pollution in most cities. The lead in petrol produces a poisonous gas which often collects in busy streets surrounded by high buildings. Children who live in areas where there is a lot of lead in the atmosphere cannot think as quickly as other children and they are clumsy when they use their hands. There are other long-term effects of pollution. If the gases in the atmosphere continue to increase, the earth’s climate may become warmer. A lot of the ice near the Poles may melt and may cause serious floods. 1. What can make people sick? 2. Where does smoke come from? 3. Can air pollution cause lung diseases? 4. What else can cause air pollution in cities? 5. Why does the earth’s climate become warmer? Làm hộ mình 3 bài này nhé

Bài 5. a) 12 công nhân trong một ngày dệt được 120 tá áo. Hỏi với mức làm như vậy, muốn dệt 180 tá áo như thế trong một ngày cần bao nhiêu công nhân? b) Một công nhân đóng gói 19 sản phẩm hết 25 phút. Hỏi trong một ca làm việc (8 giờ) người đó đóng gói được tất cả bao nhiêu sản phẩm? Bài 6. Tổ thợ mộc 3 người trong 5 ngày đóng được 75 bộ bàn ghế. Hỏi với mức ấy, tổ thợ mộc có 5 người trong 7 ngày đóng được bao nhiêu bộ bàn ghế? Bài 7. Cho hai số có trung bình cộng là 25. Số thứ nhất gấp 4 lần số thứ hai. Tìm hai số đó. Bài 8. Hai tấm vải dài 124m. Hỏi mỗi tấm vải dài bao nhiêu mét? Biết rằng tấm vải thứ nhất dài hơn tấm vải thứ hai 18m. Làm hộ tớ mấy bài này

V. Complete the sentences with the correct verb form in the bracket. 1. If we meet at 9:30, we (have) plenty of time. 2. If you (find) a pen in the cellar, don’t mention it to anyone. 3. The zookeeper would have punished her with a fine if she (feed) the animals. 4. If you pass your examination, we (have) a celebration. 5. Lisa would find the milk if she (look) for it in the fridge. 6. What (happen) if I press this button? 7. The door will be unlocked if you (press) the green button. 8. I should have voted for her if I (have) a vote then. 9. If you go to Paris, where you (stay) ? 10. If you (swim) in this lake, you’ll shiver from cold. 11. Unless you (tell) the truth, I won’t help you. 12. You’ll get pneumonia if you (not change) your wet clothes. 13. If I had known that you couldn’t eat octopus, I (not buy) it. 14. If they (hang) that picture lower, people would be able to see it. 15. She (be) able to walk faster if she didn’t have such high-heel shoes. 16. I (bring) you some beer if I had known that you were thirsty. 17. If you had touched that electric cable, you (be) electrocuted. 18. If the story hadn’t been true, the newspaper (not print) it. 19. I (not buy) things on the installment system if I were you. 20. Dan (arrive) safe if he drove slowly. VI. Correct the verbs form to complete the sentences. 1. If you (go) away, please write to me. 2. If he (eat) another cake, he will be sick. 3. I (not do) that if I (be) you. 4. If he (take) my advice, everything can go well. 5. He never does homework. If he (do) his homework, he (not worry) about his exam. 6. What you (do) if she refuses your invitation? 7. If today (be) Sunday, we (go) to the beach. 8. Unless they (pass) their examinations, they would join the army. 9. You (be) ill if you drink that water. 10. If Tom (go) to bed earlier, he would not be so tired. 11. If it’s raining heavily, we (not go) for a donkey ride. 12. If he (try) hard, he’ll pass the examination. 13. I could understand the French teacher if she (speak) more slowly. 14. If I (finish) the work in time, I (go) to the football game. 15. If you (see) Mary today, please (ask) her to call me. VII. Complete the sentences with the correct verb form in the bracket. 1. If someone offered to buy you one of those rings, which you (choose) ? 2. The flight may be cancelled if the fog (get) thick. 3. If the milkman (come) , tell him to leave two pints. 4. I (call) the office if I were you. 5. Someone (sit) on your glasses if you leave them there. 6. You would hear my explanation if you (not talk) so much. 7. What you (do) if you hear the burglar alarm? 8. If you (read) the instructions carefully, you wouldn’t have answered the wrong question. 9. If Mel (ask) her teacher, he’d have answered her questions. 10. I would repair the roof myself if I (have) a long ladder. 11. Unless they turn that radio off, I (go) mad. 12. If you were made redundant, what you (do) ? 13. We’ll have a long way to walk if we (run) out of petrol here. 14. If you shake that bottle of port, it (not be) fit to drink. 15. If you spoke louder, your classmates (understand) you. 16. I’ll probably get lost unless he (come) with me. 17. You (not have) so many accidents if you drove more slowly. 18. If you (wear) a false beard, nobody would have recognized you. 19. If she (leave) the fish here, the cat will eat it Làm hộ mình mấy chế ơi

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