1. Low energy light bulbs should be used to __________ electricity. A. spend B. buy C. convert D. save 2. We must __________ the amount of water our family used every day. A. lower B. reduce C. lessen D. narrow 3. 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 4. By the middle of the 21st century, people in developing countries __________ more renewable energy. A. uses B. will be using C. used D. have 5. Fossil fuels are very common in our society but they __________ the environment. A. renew B. provide C. waste D. pollute 6. 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 Giúp mik vs đng cần gấp