Across
- 1. tube through which liquids and gases can flow
- 7. rest while you are doing sth enjoyable
- 8. water and waste that are carried away from houses through special pipes
- 10. to do what you are told or expected to
- 11. something that is done to make sth better
- 12. done completely
- 13. disappear suddenly
Down
- 2. to make water, air, gas, etc. flow in a particular direction
- 3. act of making sth clean
- 4. liquid, gas or electricity)move from one place to another
- 5. valuable or important and not to be wasted
- 6. move slowly on water or in the air
- 9. a pipe that carries away dirty water or another liquid waste