Choose the best answer to complete each of the following sentences.
1. The wind, the sun, and the wave are some types of __________ sources of energy.
A. changeable B. alternative C. cheap D. costly
2. Remember to __________ the lights before going to bed.
A. turn B. turn on C. turn off D. stop
3. People will reduce energy __________ as much as possible.
A. consume B. consumption C. expense D. expenses
4. Nuclear power is expensive and dangerous __________ our environment.
A. for B. to C. in D. with
5. Human is looking for a clean, cheap and __________ sources of energy.
A. effective B. effect C. effectively D. effectiveness
6. Low energy light bulbs should be used to __________ electricity.
A. spend B. buy C. convert D. save
7. We must __________ the amount of water our family used every day.
A. lower B. reduce C. lessen D. narrow
8. At this time next month we __________ to Ha Long Bay for a holiday.
A. will go B. will going C. will be gone D. will be going
9. By the middle of the 21st century, people in developing countries __________ more renewable energy.
A. uses B. will be using C. used D. have
10. Fossil fuels are very common in our society but they __________ the environment.
A. renew B. provide C. waste D. pollute
11. When you save energy, you not only save money, you also reduce the demand for __________ such as coal, oil, and natural gas and that is a great way to play a part in saving the planet.
A. carbon footprint B. electricity
C. fossil fuels D. biogas
12. In India, the demand for __________ has always been more than the supply.
A. shortage B. sources C. slogan D. electricity
13. __________ energy is produced by collecting sunlight and converting it into electricity.
A. Hydro B. Nuclear C. Solar D. Wind
14. There are many available __________ power sources in Vietnam including sun, wind, water, etc.
A. nuclear B. hydro C. renewable D. solar
15. Laos and Cambodia have big plans for building up to 11__________ on the lower Mekong.
A. dams B. slogans C. energy D. coals
