提示词：

　　1.save water, the source of life , protect drinking water, stop polluting, make full use of it;

　　2.save electricity, crucial, turn off, other electric machines;

　　3. save forests, useful ,stop cutting down;

　　4.recycle useful rubbish, save resources

　　参考作文：

　　Although the world develops much faster and better, the resources on the earth get fewer and fewer. In order to protect them,something must be done.

　　Save water. Water is the source of life.(水是生命之源) No water, no life.(没有水，就没有生命) So it’s very important for us to do so. Not only should we(我们不仅应该…)protect drinking-water(饮用水) and stop polluting it, but also make full use of(充分利用) it.

　　Save electricity. It is crucial(关键的，至关重要的). We can’t imagine what the life will be like without it. Everyone should do his best to save electricity. Don’t forget to turn off lights or other electric machines(电器)when we finish working.

　　Save forests. They are useful .Please stop cutting them down and use recycled paper instead. Make our world a green one to live in.

　　Recycle useful rubbish. Plenty of rubbish can be recycled like cans, paper, bottles, and so on. We can save resources in this way.