giúp mình với mọi người ơi! III. Choose the best option among A, B, C or D. 29. The many mistakes _________ made. A. have just been B. has been just C. to be D. is just 30. Many animals ________ for their fur or other valuable parts of their bodies. A. killed B. killing C. are killed D. kill 31. Most forest in other climatic areas ________ by human beings. A. have already been affected B. have already affected C. have already been affecting D. had already been affected 32. The parcel _________ to him before his birthday. A. will send B. will be send C. will be sent D. will been sent 33. Is the new computer system ________ at the moment? A. been installed B. being installed C. being installed by people D. be installed 34. They are going to hold next year's congress in San Francisco. A. Congress is going to be held next year in San Francisco. B. Congress in San Francisco is going to be held next year. C. Next year's congress is going to be held by them held next year. D. Next year's congress is going to be held in San Francisco. 35. Zoos don’t want __________ as places where animals are imprisoned. A. to see        B. seeing C. to be seen        D. being seen 36. The report will be read __________. A. at the conference by Dr. Drake at 3 p.m. B. at the conference at 3 p.m. by Dr. Drake C. by Dr. Drake at the conference at 3 p.m. D. at 3 p.m. by Dr. Drake at the conference 37. I hope they'll have the good ________ to shut the windows before they leave. A. sense B. sensitive C. sensible D. senseless 38. People are destroying the air by adding ________ to it A. polluted B. pollutions C. polluters D. pollutants 39. Many people are very concerned about the ________ of the rainforests A.destroy B.destruction C.destructive D.destructively 40. The government have become more and more worried about the ________of the coastline by the sea. a. erode b. erosion c. erosive d. erodent IV. Choose the word(s) CLOSEST in meaning to the underlined part in the following sentences. 41. Water can be held on the land by​​ vegetation. A. plants used as food B. grown trees C. the growth of plants D. plants and trees  42. Without plants, most water would run off as soon as it falls, taking away valuable soil. A. supplying B. recovering C. removing D. holding 43. This channel allows rainwater to run off. A. keep inside B. move around C. flow into D. flow out of 44.Water pollution is more and more serious due to the tests of nuclear weapons in the seas and oceans A. circulation B. environment C. elimination D. contamination 45. Farmers use herbicides to eliminate weeds A. get on B. run off C. get rid of D. take care of V. Choose the word(s) opposite in meaning to the underlined part in the following sentences. 46. Rapid run-off would cause frequent floods and leave little water during fry seasons. A. Bad B. Weak C. Slow D. Ugly 47. The earth is being threatened and the future looks bad. A. done B. made C. defended D. varied 48. At times, this can be risky, and the keepers have been injured and one has been killed. A. good         B. useful          C. healthy               D. secure 49. We may never know the true cost of this destruction. A. imaginary B. dishonest C. unlawful D. disloyal 50. Many kinds of plants could be used to treat various dangerous diseases A. safe B. bad C. awful D. serious