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IV. Choose the best answer, a, b, c or d to complete the sentence. 1. Once non-renewable energy sources are used_______________they are gone forever. a. out b. up c. for d. off 2. Many chemicals have a damaging effect ______________effect environment. a. on b. inc. to d. for 3. Renewable energy isalso called”____________energy” because it doesn’t pollute the air. a. inexhaustible b. available c. clean d. dangerous 4. ____________ the pollution it cause, coal still plays an important role inthe production of electricity around the world. a. Despite b. Due to c. Even though d. However 5. What ________if carbondioxide levels continue to increase? a. happenb. will happen c. will be happened d. will be happening 6. The use of wind energy is growing rapidly because it is widely available and______________. a. environmentalfriendly b. environmental friendlyc. environment friendlyd. friendly environmental 7.Using solar panels at home can help____________your electric bill and your carbon footprint. a. reduceb.increasec. provided. convert 8. Wind power is the most promising______________source of energy. a. non-renewable b.natural c. limited d. alternative 9. You can save much water by______________. a. using energy saving light bulbs b. using biogas for cooking c. taking showers instead of baths d. walking or riding a bike to school 10. ‘Is it difficult to reduce our carbon footprints?’ ‘________________’ a.It depends on the way you think. b. Not at all. Just practicing the 3R’s. c. It’s not if we still rely on fossil fuels. d. I’m not sure. What will happen?

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3. The correct answer is a. inexhaustible. Renewable energy is also called 'inexhaustible energy' because it doesn’t pollute the air.

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2. The correct answer is a. on. Many chemicals have a damaging effect on the environment.

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1. The correct answer is b. up. Once non-renewable energy sources are used up, they are gone forever.

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