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 16. __________ can be an excellent source of free, renewable energy for poor farmers. A. Turbine B. Biogas C. Solar panel D. Bulb 17. The government has warned that Britain will face power __________ in the coming winters. A. coal B. shortages C. slogans D. energy 18. Wind power is one of the earliest __________ sources of energy used by humankind. A. alternative B. polluted C. harmful D. exhausted 20. Biogas can be used to __________ natural gas in cooking, heating, or electrical generation. A. use up B. replace C. pollute D. install 21. At this time next week we__________ to work to support the air pollution cutting down campaign. A. are cycling B. will be cycling C. will cycle D. will be cycled 22. Someone’s carbon____ is a measurement of the amount of carbon dioxide that their activities produce. A. footprint B. energy C. effect D. amount 23. Remember to__________ the lights before going to bed. A. turn on B. stop C. turn D. turn off 24. We will cut down in the use of natural gas because it is __________ and harmful to the environment. A. available B. abundant C. plenty D. limited 25. Hydro power is__________ because dams cannot be built in certain areas. A. abundant B. enough C. limited D. unlimited 26. __________ source of energy is the source that can’t be replaced after use. A. Effective B. Non-renewable C. Renewable D. Natural 27. Which of the following is NOT renewable source of energy? A. wind B. coal C. hydro D. solar 28. We are looking for cheap, clean and__________ sources of energy. A. serious B. dangerous C. effective D. efficient 29. By the middle of the 21st century, people in developing countries__________ more renewable energy. A. used B. have used C. uses D. will be using 30. If we go on__________ electricity, we will have to pay a lot next month. A. turning on B. widened C. wasting D. increasing 31. Biogas is__________ and cheap for cooking and heating. A. serious B. expensive C. plenty D. abundant 32. We should put__________ on our roof for the heating and hot water. A. equipment B. cracks C. solar energy D. solar panels 33. In many countries, people think that electricity, gas and water are not luxuries but__________. A. necessities B. appliances C. sales D. consumers 34. We should use light bulbs in our homes. A. a bit energy B. efficient C. low energy D. little energy 35. A hydropower station__________ in the North of the country next year. A. will be built B. has been built C. was built D. were built 36. Nuclear energy is__________, but it is dangerous. A. renewable B. non-renewable C. natural resource D. fossil fuel 37. Fossil fuels are very common in our society but they__________ the environment. A. waste B. pollute C. renew D. provide 38. All the houses in our village will be__________ by solar energy. A. frozen B. widened C. heated D. heightened 39. Several governments try to__________ the use of fossil fuels. A. waste B. save C. reduce D. increase 40. At this time next week, we__________ a wind turbine in our garden. A. will installed B. will be installing C. install D. installed 41. Low energy light bulbs should be used to__________ electricity. A. convert B. save C. spend D. buy 42. It is a good idea to use__________ when travelling long distances. A. private cars B. public transport C. cars D. taxis 43. “Why is it called a__________ source?” - “Because it can be replaced easily and quickly.” A. renewable B. non-renewable C. effective D. specific 44. We must__________ the amount of water our family use every day. A. lessen B. narrow C. lower D. reduce 45. Wave energy is a source of__________ energy. A. environmental friendly B. environmentally friendliness C. environment friendly D. environmentally friendly 46. Alternative sources of energy__________ developed in the near future. A. has been B. will be C. is D. was 47. She__________ cooking in the kitchen at 7 PM tomorrow. A. will B. is C. will be D. be 48. Some new energy-saving bulbs__________ in the dining room. A. will be put B. will put be C. will put D. will be putting 49. What should we do to electricity? A. take B. save C. cut D. waste 50. The wind, the sun, and the wave are some types of __________ sources of energy. A. cheap B. costly C. changeable D. alternative