I.Complete the second sentence so that it means the same as first one.

1. There are a few students taking part in the event.

There aren't________________________

2. They have lived here for two year.

They moved________________________

3. You should turn unwanted lights off, or you will waste a lot of electricity.

If___________________________________

4. Let's write about the three Rs?

Why________________________________

5. Learning about recycling is fun.

It's_________________________________

6. Plastic bags are cheaper than reusable bags.

Reusable bags are__________________

7. It's not good to throw old clothes away.

You_________________________________

8. Remember to turn the tap off when you are brushing your teeth.

Don't_______________________________