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Câu 1: Số đối của số |-5| + (-2) . 5 A.-5 B.15 C.-15 D.5 Câu 2 : Tập hợp ước của -6 là ? Câu 3 : Khi bỏ dấu ngoặc của biểu thức x - [ y - (-z) ] ta được A.x - y + z B.x - y - z C.x + y - z D.x + y + z
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Question I Read the passage and choose the correct answer A, B, C or D. Environmental pollution is a term that (1)______ to all the ways by which man pollutes his surroundings. Man dirties the air with (2)______ gases and smoke, (3)_____ the water with chemicals and other substances, and damages the (4)_____ with too many fertilizers and pesticides. Man also pollutes his surroundings (5)_____ various other ways. For example, people ruin natural beauty by (6)_____ junk and litter on the land and in the water. Environmental pollution is one of the most serious problems facing mankind today. Air, water and soil are necessary to the (7)_____ of all living things. Badly polluted air can cause illness, and (8)_____ death. Polluted water kills fish and other (9)_____ life. Pollution of soil reduces the amount of land that is available for growing food. Environmental pollution also brings ugliness to man’s (10)_____ beautiful world. 1. A. means B. refers C. provides D. reduces 2. A. thick B. natural C. exhaust D. influent 3. A. purifies B. pumps C. sprays D. poisons 4. A. soil B. forests C. streets D. beaches 5. A. on B. in C. by D. with 6. A. spoiling B. leaving C. scattering D. gathering 7. A. survival B. environment C. development D. growth 8. A. so B. ever C. too D. even 9. A. animal B. marine C. human D. plant 10. A. nature B. natural C. naturally D. natured

Question V. Combine the sentences in each pair into a new sentence that shows a cause/effect relationship. Use the words in brackets. 1.Many rivers and lakes are poisoned. Factories produce waste and pour it into rivers and lakes. (because) ___________________________________________________________________ 2. The environment is polluted. Birds leave their habitats and plants die. (make) ___________________________________________________________________ 3. Plastic bags are a major source of waste. We should not throw plastic bags everywhere. (so). ___________________________________________________________________ 4. The food is contaminated. People’s health is poor. (results in) ___________________________________________________________________ 5. Factories release fumes. The air breathe gets polluted. (due to) ___________________________________________________________________

Question I. Choose the best answer. (A,B, C or D ) 1. I like ______________ back my home village on holiday. A. comes B. come C. came D. coming 2. If the factory ________________ dumping poison into the lake, all the fish and other aquatic animals will die. A. continues B. to continue C. continued D. will continue 3.Water ________________ in the lake has made the fish die. A. pollution B. pollute C. polluted D. polluting 4. Mi and Nick like ______________ back Mi’s home village on holiday. A. comes B. come C. came D. coming 5. If the factory continues dumping poison into the lake, all the fish and other aquatic animals ________________. A. die B. to die C. dead D. will die 6. Water pollution is the ________________ in the lake has made the fish die. A. contaminating B. contaminate C. contaminated D. contamination 7. If we ______________ water carefully, more people will have fresh water. A. will use B. would use C. using D. use 8. If the factory continues dumping poison ________________ the lake, all the fish and other aquatic animals will die. A. into B. to C. about D. in

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