Factories dump waste into rivers. A lot of fish die

Bài 4:

1. If factories dump waste into rivers, a lot of fish will die

2. If people keep using plastic bags, oceans will be full of plastic garbage

3. They won't save a lot of money if they go to work by taxi

4. Land for farming won't decrease if people don't build too many houses

5. If the Earth becomes hotter, the polar ice cap will melt

6. You will waste your paper if you don't write on the sides

7. We don't harm the environment if we use recycle products

8. If people don't breath polluted air, they won't suffer from lung will be diseases

9. There will be too much air pollution in this area if the residents don't often cycle

10. If those companies produce reusable bags, they will receive good feedbacks

Bài 2:

8. If we arrive there before noon, we will start at six

9. If the boy eats so may green apples, he will be ill

10. If we use reusable bags for shopping, we will reduce waste

Bài 3:

1. will not be - don't drive

2. will you do - see

3. keep - will run

4. will harm - doesn't reuse

5. will buy - don't cost

6. will it be - goes

7. will save - use

8. is - will lose

9. gives - will have