1. There aren't so many students taking part in the event.

2. They moved to here two years ago

3. If you don't turn unwanted light off, you will waste a lot of electricty

4. Why don't we write about the three ... 

5. It's fun to learn about recycling

6.  Reusable bags are more expensive than plastic bags 

7. You shouldn't throw old clothes away

8. Don't forget to turn the tap off when you are brushing your teeth.

Bạn nhớ ctlhn nhé!!!!

1)There arent't many student taking part in the event

2) They moved after lived here for two years

3) If you don't turn unwanted lights off, you will waste a lot of electricity

4) Why don't we write about the three Rs?

5) It's fun to learn about recycling

6) Reusable bags are more expensive than plastic bags

7) You shouldn't throw old clothes away

8 Don't turn the tap on when you are brushing your teeth.