用方框中所给单词的适当形式填空, 每词仅用一次（每空一词）。
| mean helpful tooth without wise |
Do you know that we are using up the Earth's fresh water faster than we can replace it? We need water to stay alive and if we don't use water , we will run out!
Water is needed for just about everything we do. We need it to farm, to wash, to provide power, to control fires and—most importantly— to drink. water, we would all die.
So we should all save water if we want to have enough to stay alive. Using less water saving money and saving energy. Saving water is EASY. Here are some tips:
* Have shorter showers and only half fill the bath.
* Turn the tap off while you soap your hands or brush your .
* Fix any taps or hoses（软管）that drip— every drop counts!