1, If the air in city is polluted, it can cause peole's respiratory problems.

2,,If smog is frequently formed in the city, it will cause dificulty in breathing, headache and even lung cancer

3,  If carbon monoxide concentrates in great amounts , it will be harmful.

4, The climate will change if more trees are cut down for hardwood.

5, If we do not control the pollution soon , it will be too late.

6, If we do not protect the frontier, we will suffer from many natural disasters.

Đề bài; Hoàn chỉnh các câu sau

1. If the air / in / city / be / polluted / , / it / can / cause / people's / respiratory / problems

=> If the air in city were polluted, it could cause peole's respiratory problems

2. If / smog / be / frequently / formed / in / city / , / it / cause / difficulty / in / breathing / headache / even / lung caner

=> If smog were frequently formed in the city, it would cause difficulty in breathing, headache and even lung cancer

3. If / carbon monoxide / concentrate / in / great/ amounts / , / it / be / harmful

=> If carbon monoxide concentrated in great amounts, it would be harmful.

4. the climate / change / if / more trees / be / cut / down / for / hardwood

=> The climate would change if more trees were cut down for hardwood

5. If / we / not / control / pollution / soonn / , / it / be / too / late

=> If we don't control pollution soon, it will be too late

6. If / we / not / protect/ frontier / , / we / suffer / many / from / natural / disasters

=> If we don't protect the frontier forests, we will suffer from many natural disasters

If people don’t stop dumping waste into the rivers, then pollution will increase. If both north and south polar ice caps melt, many huge landmasses will be submerged under a lot of water. If the air in the city is polluted, it can cause people’s respiratory problems. If smog is frequently formed in the city, it can cause difficulty in breathing, headache, and even lung cancer. If carbon monoxide concentrates in great amounts, it’ll be harmful. The climate will change if more trees are cut down for hardwood. If we don’t control pollution soon, it will be too late. If we don’t protect the frontier, we will suffer many losses from natural disasters. 

Dựa vào từ cho sắn , viết câu hoàn chỉnh:

1, If people do not stop dumping waste into rivers, the pollution will increase.

2,If the polar ice caps melt , huge landmasses will be under water.

3, If the air in city is polluted, it can cause peole's respiratory problems.

4,If smog is frequently formed in the city, it will cause dificulty in breathing, headache and even lung cancer,

5, If carbon monoxide concentrates in great amounts , it will be harmful.

6, The climate will change if more trees are cut down for hardwood/.

7, If we do not control the pollution soon , it will be too late.

8, If we do not protect the frontier, we will suffer from many natural disasters.

Dựa vào từ cho sắn , viết câu hoàn chỉnh:

1, If/people/not/stop/dumping/waste/into/rivers/,/pollution/increase/.

=> If people don't stop dumping waste into rivers, water pollution will increase

2,If/polar/ice caps/melt/,/huge landmasses/ be/under/water.

=> If polar ice caps melt , the huge landmasses will be under the water

3,If the air,/in/city/be/polluted/,it/can/cause/peole's/respiratory/problems.

=> If the air in the city is polluted, it could be the cause of people's respiratory problems

4,If/smog/be/frequently/formed/in/city/,/it/cause/dificulty/in/breathing/headache/even/lung cancer,

=> If smoking is frequently formed in the city, it can cause difficulty in breathing problems, headaches and even lung cancer.

5, If/ carbon monoxide/concentrate/in/great/amounts/,/it/be/ harmful.

=> If the amount of carbon monoxide concentration in the great lungs is too large, it will be very harmful

6, The climate/change/if/more trees / be /cut/down/for/hardwood/.

=> The climate will be changed if more trees are cut down for hardwood

7, If/we/not/control/pollution/soon/,/it/be/too/late.

=> If we don't control pollution soon , it will be too late

8, If/we/not/protect/frontier/,/we/suffer/many/from/natural/disasters.

=> If we don't protect the frontier, we will suffer from many natural disasters

1, If people do not stop dumping waste into rivers, the pollution will increase.

2,If the polar ice caps melt , huge landmasses will be under water.

3, If the air in city is polluted, it can cause peole's respiratory problems.

4,If smog is frequently formed in the city, it will cause dificulty in breathing, headache and even lung cancer,

5, If carbon monoxide concentrates in great amounts , it will be harmful.

6, The climate will change if more trees are cut down for hardwood.

7, If we do not control the pollution soon , it will be too late.

8, If we do not protect the frontier, we will suffer from many natural disasters.

1. Nếu các chỏm băng ở hai cực tan chảy, các tàu đổ bộ khổng lồ sẽ ở dưới nước

2. Nếu khói bụi thường xuyên hình thành trong thành phố, nó sẽ gây khó thở, đau đầu và thậm chí là ung thư phổi

3. Khí hậu sẽ thay đổi nếu càng nhiều cây bị chặt để lấy gỗ cứng

They believe that air pollution cause some health problems for people in the city.

- It....is believed that air pollution cause some health problems for people in the city..

- Air pollution.is believed to cause some health problems for people in the city..

They believe that air pollution cause some health problems for people in the city.

- It is believed that air pollution cause some health problems for people in the city.

- Air pollution is believed to cause some health problems for people in the city.

Unless we plant more trees, the air will be polluted

Richard is a very good cook 

It is interesting to go swimming in the summer 

Question 1. Choose ONE appropriate question in the box to each paragraph below:

1/ How do industry and transport cause pollution?
2/ How can I help?
3/ What is the pollution?
4/ How can industry help?
5/ What cause pollution?
6/ What about air pollution?

A. _3__ Pollution is the poisoning of the land, sea and air.
B. __5_ Mainly industry and transport. If you go to any city, you will see too many
factories, too many cars with not enough people in them, and not enough public transport.
C. __1_ Factories and vehicles produce waste which goes into the air and rivers and
spreads all over the land. Poisons in the waste build up over the years and harm trees,
plants, animals, and people.
D. _6__ Waste gases build up in the air, and dissolve into raindrops, forming a weak
acid. This "acid rain" can fall far away from the country which produced it, killing trees in
forests and fish in lakes and rivers.

E. _4__ If companies clean their waste gases before releasing them into the
atmosphere, there'll be much less air pollution and no acid rain. But this can be expensive
and it needs all the world's companies to do it.
F. _2__ Cars pollute the atmosphere. Walk, cycle and use public transport as much as
possible. Only use your car when you really need to, and use unleaded petrol if you can -
lead is one of the most dangerous ingredients in petrol. Join us, and help us to campaign for
cleaner air for everybody.

Hồ Bảo Trâm giúp em nx chị owiii :333