III. Complete the sentences, using the correct form of the words in brackets. 1. habitats have been destroyed in recent years. (nature) 2. A number of cleaning products contain chemicals. (harm) 3. Water samples collected at these villages were seriously with bacteria. (contaminate) 4. People believe that the water has brought cancer to the local residents. (pollution) 5. Light pollution make us to see the stars in the sky. (able) 6. Noise is considered as pollution. (environment) IV. Complete the sentences, using the correct form of the words in brackets. 1. The soil becomes because of the use of so many pesticides and fertilizers. (contaminate) 2. waste spills can contaminate groundwater.(industry) 3. In many developing countries, water pollution is usually a leading cause of . (die) 4. elements have been found in both ground and underground water sources.(pollute) 5. Fish and many other animals are killed by in their habitat.(pollute) 6. Astronomers are concerned about light pollution because they have in viewing activities in the sky and outer space. (difficult) V. Combine each pair of sentences, using conditional sentences type 1. 1. A person looks at the sky at night. He is not able to see the Milky Way by naked eye. 2. Noise pollution happen regularly. It causes stressor nuisance. 3. Water pollution gets more serious in the future. It affects the development of economy the pollution and society. 4. Australia has invested in water in Viet Nam with good results. Haft of the population in the rural areas has access to fresh water. 5. You use compact light bulbs. You save a lot of energy. 6. We have more space. We plant more trees. VI. 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 area. 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 hormones that help us to see things properly. 1. A. more B. as 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. spend 5. A. waste B. wastes C. wasting D. wasteful 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