1,Because scas and rivers are too dirty to swim in.

2,Yes,there is.

3,We are cutting down too many trees,burning the forests and they are also destroying lots ò plants and animals.

4,Because there is too liule rice.

5,I think we should not litter ,waste food and we should plant lots of trees and clean it regulary.

             -Thông cảm vì mình ko làm vào vở đc ạ.

6. Read the following passage, then answer the questions(1,25pt)

We are destroying the earth. The seas and rivers are too dirty`_^(1)` to swim in. There is too much smoke in the air in many cities in the world`_(2)`. We are cutting down too many trees. We are burning the forests. we are also destroying lots of plants and animals. Many areas of the earth are wasteland. Farmers in many parts of the world cannot grow enough to eat. In some countries there is too liule rice. The earth is in danger Save the Earth!

1. Why can't we swim in the seas and rivers?

=> Because The seas and rivers are too dirty . 

2. Is there too much smoke in the air in many cities in the world?

=> Yes , there is .

3. What are we doing to our environment?

=> We are cutting down too many trees , burning the forests, destroying lots of plants and animals.

4. Why can't farmers in many parts of the world grow enough to eat?

=> Because many areas of the earth are wasteland . (Hoặc : because of the polluted soil environment )(câu này mk không chắc lắm  )

5. What do you think we should do to save the carth?

=>I think we shouldn't littering , cutting down tree , destroying lots of plants ,...