题目内容
根据句意和首字母提示补全单
词.
![](http://thumb.1010pic.com/pic1/upload/papers/c03/20120816/20120816092805598148.png)
1. Don't w________ water. Please turn off the cock after you wash your hands.
2. Gold, silver and iron are all m_______.
3. It's more and more important for everyone to save e_______ now.
4. Air p_______ is quite harmful to our health.
5.The students from a green school are helping collect waste paper and bottles for r________.
2. Gold, silver and iron are all m_______.
3. It's more and more important for everyone to save e_______ now.
4. Air p_______ is quite harmful to our health.
5.The students from a green school are helping collect waste paper and bottles for r________.
1. waste 2. metals 3. energy 4. pollution 5. recycling
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