1. Biogas is__________ and cheap for cooking and heating. A. serious B. expensive C. plenty D. abundant 2. We should put__________ on our roof for the heating and hot water. A. equipment B. cracks C. solar energy D. solar panels 3. In many countries, people think that electricity, gas and water are not luxuries but__________. A. necessities B. appliances C. sales D. consumers 4. We should use light bulbs in our homes. A. a bit energy B. efficient C. low energy D. little energy 5. 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 6. Nuclear energy is__________, but it is dangerous. A. renewable B. non-renewable C. natural resource D. fossil fuel 7. Fossil fuels are very common in our society but they__________ the environment. A. waste B. pollute C. renew D. provide 8. All the houses in our village will be__________ by solar energy. A. frozen B. widened C. heated D. heightened 9. Several governments try to__________ the use of fossil fuels. A. waste B. save C. reduce D. increase 10. At this time next week, we__________ a wind turbine in our garden. Giúp mik nha mik đng cần gấp ai trl nhanh nhất mik cho ctrlhy