1. If we use less vehicles, we ____ _____ the amount of carbon dioxide into the air. 2. If you _____ _____ the president, what you do to prevent air pollution. 3. If there were no fresh water left, what __________ ___? 4. If people (not) ________________ rubbish in the street, it would look better. 5. If there wasn’t so much light in the cities at night, we __________ the starts more clearly. 6. If the water is contaminated, people ___________________ from many diseases. 7. If chemicals from factories are dumped into rivers and lakes, they _____-__ water pollution. 8. If people want to protect their planet, they should ________ their habit of using plastic bag for convenience. 9. If we recycle paper, we _______ 1000 trees a day. 10. If people were more aware of the negative consequences of pollution, they might __take____ actions to prevent it

1. If we use less vehicles, we will reduce the amount of carbon dioxide into the air.

2. If you were the president, what you do to prevent air pollution.

3. If there were no fresh water left, what would happen?

4. If people (not) didn't throw rubbish in the street, it would look better.

5.If there wasn’t so much light in the cities at night, we would see the starts more clearly.

6. If the water is contaminated, people will suffer from many diseases.

7. If chemicals from factories are dumped into rivers and lakes, they will cause water pollution.

8. If people want to protect their planet, they should change their habit of using plastic bag for convenience

9. If we recycle paper, we will save 1000 trees a day.

10. If people were more aware of the negative consequences of pollution, they might __take____ actions to prevent it

`**` Áp dụng:

`-` Cấu trúc câu điều kiện loại 1: If + S + V(HTĐ), S + will/won't/can/should/may + V-inf

`-` Câu điều kiện loại 2: If + S + V(QKĐ), S + would/could/might + V-inf