Exercise 4: Do the crossword by completing the sentences below.
1. Don’t use ___________ bags. They are not good for the environment.
2. There are three main ___________: air, soil, and water.
3. A ___________ consumes more electricity than a tube light.
4. Something can be used again is called “___________” thing.
5. ___________ off the faucet while you are brushing your teeth.
6. We are raising fund for a ___________ organization.
7. Remember to put your rubbish in the rubbish ___________
8. I’m so thirsty. Could you buy me a ___________ of water?