2. A lot of factories continue to dump toxic waste into lakes and rivers.

3. Remember to turn off the light when you don't use.

4. Noise is any sound that loud and constant.

5. How about planting more trees on streets?

Exercise 8: Rewrite the sentences:

1. If Huong had tidied the house,her mum wouldn't felt angry.

2. The more air pollution is,the more disease people will get.

3. A lot of underwater creators die due to water pollution.

4. We need to use water carefully.

5. There has been a dramatical reduction in the air pollution over the last few years.

2. A lot of factories continue to dump toxic waste into lakes and rivers.

3. Remember to turn off the light when you don't use.

4. Noise is any sound that loud and constant.

5. How about planting more trees on streets

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