Choose the correct answers.
7.If people can…………………wastes, they will save a lot of money.
A.reuse B.reduce C.rebuild D.use
8. new technology, we now have super smart TVs, smart phones.
A.Because B.Because of C.Thanks D.Thanks to
9.Robots will do most of the housework, we will have more time for our family.
A. so B.but C.although D. if
10. We should have recycling bins in each classroom for things.
A. use B.reuse C.reused D.reusable
11. If we plant more trees, the will be greener.
A.neighbour B. soil C. air D.neighbourhood
12. All of the machines will have a special card .
A.start B.to start C.starting D.to starting
13.If we all the trees, there will be no more oxygen for us to breathe.
A.cuts B.cut off C.cutting D.cut down
14.We should open all the windows, so we don't use air-conditioners.
A.have B.have to C.needn't D.need
15.Plant more trees in the schoolyard because they will provide shade and the atmosphere fresher.
A. do B. make C. have D. use
16.Our dream house will use only solar energy so that we can make the clean and green.
A.nature B.environment C.kitchen D.home
17.Our dream house will be located the sea.
A. on B. at C. in D.between
18. Don't old things because perhaps you will need them later.
A. throw B. throw away C. throwing D.throwing away
19. causes many breathing problems.
A. Fresh air B. Fresher air C. Polluting air D.Polluted air
20. If you eat fast food, you will be fatter easily.
A. very B. very much C. too much D. most
