10. Low energy light bulbs should be used to ___electricity. A. spend B. buy C. convert D. save 11. All the house in our village will be ___ by solar energy. A. heated B. heightened C. frozen D. widened 12. If we go on _ . electricity, we will have to pay a lot next month. A. wasting B. increasing C. tuming on D. making 13. We must _ _ the amount of water our family use every day. A. lower B. reduce C. lessen D. narrow 14. I think means of transport in the future_ petrol. A. aren't using B. aren't going to use C. won't use D. won't be using 15. At this time next month, we the new flying boat. A. are testing B.are going to test C. will test D. will be testing 16. 'What did Mr. Nam talk about?'" A. He has a good job. B. His parents are now in London. C. His family. D. He has a big family làm giúp tớ với ạaaa giải thích nữa