mng giúp em với ạ Exercise 3. Mark the letter A, B, C, or D to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions. 36. We are facing severe environmental pollution despite the fact that many world organizations are working hard to reduce it. A. heavy B. destructive C. harmful D. serious 37. Water pollution is a result of dumping pollutants such as detergents, pesticides, oil, and other chemicals in rivers, which makes the water unclean. A. substances B. stuffs C. contaminants D. wastes 38. Stop the degradation of the planet's natural environment and build a future in which humans live in harmony with nature. A. coexist peacefully with B. fall in love with C. agree with D. cooperate with 39. WWF was set up in 1961 and had its operations in areas such as the preservation of biological diversity. A. difference B. abundance C. variety D. plenty 40. The seashore was much polluted because of the amount of waste left there. All this rubbish is killing fish and other marine life. A. sea plants B. sea mammals C. water life D. sea creatures 41. In 1986, the organization changed its name to World Wide Fund for Nature. However, it has operated under the original name in the US and Canada. A. old B. former C. first D. ancient 42. Some of WWF's missions are: conserving the world's biological diversity, ensuring the use of renewable natural resources, and promoting the reduction of pollution. A. jobs B. careers C. tasks D. actions 43. Air pollution is a consequence of fossil fuel burning by motor vehicles, factories, aircraft and rockets. A. product B. example C. harm D. result 44. The natural environment has been seriously influenced and degraded by human activities through many decades. A. worsened B. damaged C. destroyed D. reduced 45. Global warming is the gradual increase of temperature on the Earth's surface due to greenhouse effect. A. steady B. slow C. sharp D. abrupt Exercise 4. Mark the letter A, B, C, or D to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions. 46. Fresh water is very important to life because no one can live without it. Yet it is one of the limited and most endangered natural resources on our planet. A. Clean B. Drinkable C. Polluted D. Running 47. One way to protect our environment from pollution is to reduce wasteful consumption. A. costly B. excessive C. safe D. economical 48. If you follow at least one of the tips, you can be proud of taking part in the preservation of water, one of the very important and limited natural resources on earth. A. self-confident B. self-satisfied C. discontent D. unpleasant 49. Soil pollution leads to lack of fertile land to grow enough food for an increasing population. A. arid B. rich C. unclean D. deserted 50. Global warming may lead to many negative changes, including harsher weather conditions. A. more unbearable B. milder C. more extreme D. more scrious