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$\sqrt[n]{}$ $x^{2}$ +2= $\sqrt[n]{4x}$
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VIII)-Choose the word or phrase among A, B, C or D that best fits the blank space in the following passage. Have a walk (42)___________ a beach, listen to the sound of the sea waves, and suddenly you see a lot of rubbish on the beach. Pollution takes away all the (43)__________ of our beaches. I feel really very annoyed (44)_____________ I see plastic bags lying on the sand, cigarette ends buried in the sand, and soda cans floating in the sea. There are a lot of things that we can do. (45)___________ we see rubbish, we should do our part in the protecting the land (46)___________ picking it up and throwing it in dust bins. (47)_____________, we can form some kind of organization that helps (48)___________ the beaches. If everyone does their part, the beaches will be a wonderful and beautiful place. We need to start now (49)___________ the beaches are damaged beyond repair. 42. A. at B. in C. on D. over 43. A. beauty B. beautiful C. beautifully D. being beautiful 44. A. before B. after C. when D. while 45. A. While B. If C. Unless D. Soon 46. A. by B. with C. of D. in 47. A. Nevertheless B. Therefore C. However D. Moreover 48. A. cleaning up B. clean up C. cleaning off D. clean off 49. A. before B. after C. until D. when IX)-Read the passage, and do the tasks that follow. Bike Capital of the World Copenhagen has over 390 kilometers of bike lanes and is widely regarded as the bike capital of the world. The Danes are well-known for their love of cycling, and Copenhagen’s network of bike lanes is studied by other cities. Cyclists in Copenhagen are saving the city 90,000 tons of CO 2 emission annually. Every day, about 789,000 miles are cycled in Copenhagen. Thirty-six percent of the city’s residents bike to school or work. The city is looking to increase that number to 50% by building more bike lanes, widening existing lanes, creating biking –only bridges over the city’s waterways, providing more space for parking bikes, and improving safety along existing bike routes. The city of Copenhagen clearly understands the value of biking-friendly cities. They are healthier, more environmentally-friendly, and allow for better quality of life. Task 1: Match a word in column A with its definition in column B, writing the answer in each blank. Answe r A B ______ 50. regarded A. once a year ______ 51. well-known B. thought of in a particular way ______ 52. annually C. how good or bad something is ______ 53. space D. known by a lot of people; famous ______ 54. quality E. an area that is empty or not used Task 2: Read the passages again, and answer the questions. 55. Why is Copenhagen regarded as the bike capital of the world? 56. What are the Danes well-known for? 57. How many miles are cycled in Copenhagen every day? 58. What is the city going to do? 59. What are the benefits of biking-friendly cities?

V)-Circle the mistake in each sentences, and then correct it. 22. Long exposure to loud noise results permanent hearing loss. 23. The misuse of resources and importer dumping of waste make land pollution. 24. The soil becomes contaminated because the use of so many pesticides and other farming chemicals. 25. Oil slicks from boats or ships pollute the sea, because many fish and sea-birds die. 26. In many developing countries, water pollution is usually a leading cause of death if people drink from polluted water resources. 27. We should plant trees in our neighbourhood so trees help cool the planet. VI)-Combine each pair of sentences, using the words/ phrases in brackets. You can make some changes. 28. We are unable to see the stars in the sky. Light pollution occurs. (makes) 29. Glass panels, windows, lawns and roofs make light pollution worse. They reflect both artificial and sun light. (because) 30. All sounds are not noise. Noise is any sound that is unwanted and goes beyond its certain limit, for example, above 80 decibels. (because) 31. More and more noise is created by modern civilization. It has now become a major environmental pollutant, especially in urban areas. (so) 32. Contamination in the air happens. There is acid rain which damages soil, vegetation and aquatic life of the region. (causes) 33. Noise pollution is one of the major causes of stress and anxiety. People suffer from stress and anxiety. (because of) VII)-Rearrange the sentences in order to make a meaningful conversation, writing the correct letter (A-H) in each blank. The conversation starts with number 0. 0 Mi: Nick, last Sunday my mother and I went to the mall in the city center to buy some new clothes for our Tet holiday. The streets were so bright at night. 34. A. Mi: I see. Do you know any other example of light pollution? 35. B. Mi: Besides the waste, light pollution many affect human health and our sleep cycles. 36. C. Mi: Light pollution? Our teacher has just mentioned it in the lesson this morning. Why is too much light at night harmful? 37. D. Mi: And sometimes we also have extra or unnecessary lights around the house. 38. E. Nick: I enjoy Tet in Vietnam, Mi. But a lot of lights and posters along the streets may cause light pollution. 39. F. Nick: You’re right, Mi. I think it is very wasteful because we use much more energy to light up the city or our home all day round. 40. G. Nick: Because it may prevent us from seeing the stars and other planets. 41. H. Nick: Yes, we can mention street lamps that shine in all directions, instead with a hood to point light downward the streets, or cities with lights all night long. E đag gấp lắm ah :<

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