III. Choose the correct answer A, B, C, or D to finish the sentences. 1. We will cut down on the use of natural gas because it is ……………… and harmful to the environment. A. plenty B. limited C. available D. abundant 2. In many countries electricity, gas and water are ……………………. A. sales B. consumers C. necessities D. appliances 3. Low energy light bulbs should be used to …………………….electricity. A. spend B. buy C. convert D. save 4. All the houses in our village will be …………………….by solar energy. A. heated B. heightened C. frozen D. widened 5. If we go on …………………….electricity, we will have to pay a lot next month. A. wasting B. increasing C. turning on D. making 6. We must …………………….the amount of water our family use every day. A. lower B. reduce C. lessen D. narrow 7. Which of the following is NOT renewable source of energy? A. hydro B. solar C. wind D. coal 8. Nuclear energy is ……………………., but it is dangerous. A. renewable B. fossil fuel C. non-renewable D. natural resource 9. Some new energy-saving bults …………………….in the dining room. A. will put B. will be putting C. will be put D. will being put 10. At this time next week we ………….to work to support the air pollution cutting down campaign. A. will cycle B. will be cycled C. are cycling D. will be cycling 11. Fossil fuels are very common in our society but they the environment. A. renew B. provide C. waste D. pollute