16. If people can ................. waste they will save a lot of money.
A. reuse B. reduce C. rebuild
17. ................ technology, we now have super smart TVs, smart phones.
A. because B. because of C. thanks to
18. If we plant more trees, the .............. will be greener.
A. air B. neighbour C. neighbourhood
19. If we ............. all the trees, there will be no oxygen for us to breathe.
A. cut down B. cuts C. cut off
20. Our dream house will use only solar energy so that we can make the .......... clean and green.
A. nature B. environment C. kitchen
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Sinh Học lớp 12
