many products are now helping you with your energy bills. a. reduce b. reuse c. recycle d. cut down 5. 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. left. stop 6. future houses will have hi-tech rooms for all of the family members. a. read b. to read c. reading d. to reading 7. our houses will use the sun or the wind electricity. a. to have b. to do c. to make d. to give 8. in the future, cars might use energy from. a. gas b. water c. oil d. power 9. our dream house will be located in the sea. a. on b. at c. in d. between 10. don't old things because perhaps you will need them later. a. throw b. throw away c. throwing d. throwing away 11. causes many breathing problems. a. fresh air b. fresher air is. polluted air d. polluted air 12. we won't use cd players because we will have smartwatches that _____ music. a. play b. plays c. hear d. listen to 13. if you eat fast food, you will be fatter easily. a. very b. very much c. too much d. most

People need to breathe. If we don't breathe, we will die. But how clean is the air people breathe? If they breathe (1)............air, they will have breathing problems and become ill. Plants and animals need (2)..........air too. A lot of the things (3)...........our lives create harmful gases and make the air dirty, like cars, motorbikes and factories. Dirty air is called "polluted air". Air pollution can also (4)...........our Earth warmer. The problem of air pollution started with the burning of coal homes (5).............factories.

Trả lời dùm mình câu 1 thôi 

IX. Choose the best answer.

(giải thích giúp tớ tại sao lại chọn câu đấy với ạ)
1. If we reduce the energy we use, we……………….money.
A. are saving B. will save C. will be saved D. will be saving
2. At 3 o’clock tomorrow afternoon, I …………..the meeting on Climate Change.
A. attended B. have attended C. will be attended D. will be attending
3. The effects of climate change…………..at the high – level conference next month.
A. will discuss B. will be discussing C. will be discussed D. was discussed
4. Do you think renewable energy ……………..fossil energy before 2030?
A. will replace B. is replacing C. will be replacing D. will be replaced
5. The children …………..to school because it’s snowing.
A. are walking B. will walk C. will be walking D. won’t be walking
6. Solar and wind …………..instead of fossil fuels within 20 years?
A. are used B. will be used C. will use D. will be using
7. Humankind’s future…………….bright if they can utilize renewable energy in the future.
A. is B. was C. will be D. won’t be
8. Where …………..in ten years?
A. do you live B. are you living C. will you be lived D. will you be living
9. We ……………able to create a future that’s free of carbon pollution by using renewable energy sources.
A. will be B. won’t be C. will be being D. will have been
10. Solar panels ……………….outdoors to capture sunlight and transform it into electricity.
A. will place B. will be placing C. will be placed D. will have placed

Question 5. Breda goes jogging every morning to keep ___________.

A. exercise B. trained C. fit D. health

Question 6. We have a test on Monday, ___________ I will have to study this weekend.

A. and B. but C. so D. because

Question 7.______ causes many breathing problems.

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

Question 8.___________ is a marathon in miles? ~ About 26 miles.

A. How often B. How many C. How long D. How wide

Question 9. The Statue of Liberty is one of the most famous ___________ in the United States.

A. towers B. landmarks C. capitals D. cities

Question 10. They showed a ___________ on global warming called ‘Warming Warning’.

A. documentary B. romance C. comedy D. cartoon

Question 11. We should have______ bins in each classroom.

A. recycling B. recycle C. recycled D. recycles

Question 12. - ‘Can you give me the remote control on the table?’

- ‘___________ Don’t you like this programme?’

A. What? B. You’re welcome. C. Certainly. D. Really?

Question 13. All of the machines will have a special card________. .

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

Question 14. If we ______ all the trees, there will be no more oxygen for us to breathe.

A. cuts B. cut off C. cutting D. cut dowQuestion 5. Breda goes jogging every morning to keep ___________.

A. exercise B. trained C. fit D. health

Question 6. We have a test on Monday, ___________ I will have to study this weekend.

A. and B. but C. so D. because

Question 7.______ causes many breathing problems.

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

Question 8.___________ is a marathon in miles? ~ About 26 miles.

A. How often B. How many C. How long D. How wide

Question 9. The Statue of Liberty is one of the most famous ___________ in the United States.

A. towers B. landmarks C. capitals D. cities

Question 10. They showed a ___________ on global warming called ‘Warming Warning’.

A. documentary B. romance C. comedy D. cartoon

Question 11. We should have______ bins in each classroom.

A. recycling B. recycle C. recycled D. recycles

Question 12. - ‘Can you give me the remote control on the table?’

- ‘___________ Don’t you like this programme?’

A. What? B. You’re welcome. C. Certainly. D. Really?

Question 13. All of the machines will have a special card________. .

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

Question 14. If we ______ all the trees, there will be no more oxygen for us to breathe.

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

1. If we keep on ______ ______ the air, more people will suffer from diseases. ( pollution)

2. The local authorities have received many letters of _______ ______ (complain)

3. Ba was _______  ______ill right after eating those cakes . ( serious)

4. ______  ______are interested in the protection of the environment . (conserve)

5. Without _______ ______, some people wouldn’t catch fish . (electric)

6. What is responsible for the ______ ______ problems . ( environment)

7. Use public transport or we won’t _________  ______pollution. (minimum)

8. If _________  ______continues, there will be no forest left ten years from now. (forest)

9. The rising level of air pollution has caused concern among __________  ______ (environment)

10. Many factories still allow _________ ______, such as toxic waste, to flow into our rivers. ( pollute)

Exercise: Rewrite the sentences using 'used to'

1. I walked to school every day.

2. When we were children, my sister and I went fishing with our grandfather.

3. We went there to relax and enjoy fresh air.

4. Ngoc played basketball when she was at highschool.

5. We played hide-and-seek when we were small.

6. I loved eating candy, but now I hate it.

7. In the past, my father stayed up late a lot. 

8. I was able to speak Korean, but now I have forgotten it all. 

9. Linda watched the game show every weekend. 

10. The forest was so fresh and peaceful.