1

    B.reduce     

2

      D.Thanks to

3

A.so       

4.

     C.reused        

5.

A.neighbour     B.soil       C.air        D.neighbourhood

6.

A.start        B.to start          C.starting            D.to starting

7   

A.cuts         B.cut off              C.cutting            D.cut down

8.

A.have       B.have to          C.needn’t            D.need

9.

A.do              B.make            C.have          D.use

10.

A.nature            B.environment             C.kitchen            D.home

11.

A.reduce         B.reuse          C.recycle             D.cut down

12.

 A.make         B.have           C.leave             D.stop

13.

A.read          B.to read            C.reading          D.to reading

14.

A.to have          B.to do            C.to make             D.to give

15.

A.gas           B.water            C.oil             D.power

Our dream house will be located ____the sea.

A. on            B. at          C. in            D.between 

22. 

A. throw         B. throw away             C. throwing               D.throwing away

23.

A. Fresh air                 B. Fresher air               C. Polluting air            D.Polluted air

24. 

A. play            B. plays               C. hear              D. listen to

25. 

A. very           B. very much            C. too much           D. most

III.Complete the first conditional sentences. 

If we stay at home, we (miss) _will miss____the show.

We (ask) _will ask____about it, if you want.

If he (want) __wants__it, we’ll buy it.

If it (not/ work) __doesn't work___, we’ll take it back.

They (not/ go) __won't go___on holiday this year, if their friends come to see them.

You will be tired tomorrow if you (not/ go) __don't go___to bed early.

(the boys/ wear) _Will the boys wear____their new T-shirts tomorrow if it is sunny?

The cake (burn) _will burn___if he doesn’t turn off the oven.

We won’t go to the beach tomorrow if it (rain) rains____.

Will you walk to school if the bus (not/ come) _doesn't come____soon?

IV. Fill in each blank with ONE suitable word.

36.plants

37. _stand

38. environment

39. creative

40. poputed

1.If people can................ wastes, they will save a lot of money.(reduce wastes:giảm thiểu lãng phí)

A.reuse    B.reduce     C.rebuild     D.use

2.______new technology, we now have super smart TVs, smart phones.

A.Because      B.Because of      C.Thanks      D.Thanks to

3.Robots will do most of the housework, ______we will have more time for our family.

A.so        B.but       C.although      D.if

4.We should have recycling bins in each classroom for _____things.   

A.use       B.reuse      C.reused        D.reusable

5.If we plant more trees, the _____will be greener. 

A.neighbour     B.soil       C.air        D.neighbourhood

6.All of the machines will have a special card _____.

A.start        B.to start          C.starting            D.to starting

7.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

8.We should open all the windows, so we don’t _____use air-conditioners.

A.have       B.have to          C.needn’t            D.need

9.Plant more trees in the schoolyard because they will provide shade and _____the atmosphere fresher.

A.do              B.make            C.have          D.use

10.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

11.Many products are now helping you _____your energy bills.

A.reduce         B.reuse          C.recycle             D.cut down

12.It takes a lot of energy to keep food cool, so don’t ____the fridge door open or putting hot things inside. 

 A.make         B.have           C.leave             D.stop

13.Future houses will have hi-tech _____rooms for all of the family members.

A.read          B.to read            C.reading          D.to reading

14.Our houses will use the sun or the wind ____electricity.

A.to have          B.to do            C.to make             D.to give

15.In the future, cars might use energy from ____.

A.gas           B.water            C.oil             D.power

Our dream house will be located ____the sea.

A. on            B. at          C. in            D.between 

22. Don’t ____old things because perhaps you will need them later.

A. throw         B. throw away             C. throwing               D.throwing away

23. _____causes many breathing problems.

A. Fresh air                 B. Fresher air               C. Polluting air            D.Polluted air

24. We won’t use CD players because we will have smart watches that _____music.

A. play            B. plays               C. hear              D. listen to

25. If you eat ______fast food, you will be fatter easily.

A. very           B. very much            C. too much           D. most

III.Complete the first conditional sentences. 

If we stay at home, we (miss) _will miss____the show.

We (ask) _will ask____about it, if you want.

If he (want) __wants__it, we’ll buy it.

If it (not/ work) __doesn't work___, we’ll take it back.

They (not/ go) __won't go___on holiday this year, if their friends come to see them.

You will be tired tomorrow if you (not/ go) __don't go___to bed early.

(the boys/ wear) _Will the boys wear____their new T-shirts tomorrow if it is sunny?

The cake (burn) _will burn___if he doesn’t turn off the oven.

We won’t go to the beach tomorrow if it (rain) rains____.

Will you walk to school if the bus (not/ come) _doesn't come____soon?

IV. Fill in each blank with ONE suitable word.

36. Soil pollution can make _plants___die.

37. What do these three Rs __stand___for?

38. If we all use this kind of bag, we’ll help to protect the environment ______.

39. We should find ___creative__ways to reuse our old items before throwing them away.

40. If the river is not__poputed____ ,there will be more fish.