题目内容：

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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.No water, no life.So it's very important for us to do so.Not only should we protect drinking water and stop polluting it, but also make full use of it.

Save electricity.It is crucial (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 the lights or other electric machines 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.

Information Card

How are the resources on the earth？1.________________.	1.
How to save electricity when we finish working？ Turn off the 2._______________.	2.
How to save water？ Protect drinking water, stop polluting it, and also 3.____________.	3.
How to deal with useful rubbish？ 4.______________.	4.
How many things that must be done are mentioned？ 5.________________.	5.