3.

Q7. A

Q8. B

Q9. B

Q10. A

4. 

1. dumping waste

2. air pollution

3. water temperature

4. Earth's surface

5. substance

6. surprised

7. light pollution

8. waste

9. acid rain

10. poisonous

C. READING

1.

1. How

2. every

3. in

4. into

5. made

6. main

7. for

8. less

9. need

10. By

2.

1. throw away

2. reuse

3. recycle

4. destroy

5. burn

6. poisons

7. bury

8. I reuse plastic bags.

9. Me and my school throw away with unrecyclable rubbish and recycle the reusable and recyclable (có thể tái sử dụng và tái chế) ones.

10. [tự kể: harmful smoke from factories, fumes (khói bụi) from vehicles, plastic bags,...]

3.

1. A

2. C

3. D

4. B

5. A

6. A

7. B (irrigate = water = tưới)

8. D

9. C

10. A

HỌC TỐT!