题目

阅读下列短文，根据短文内容填空，在未给提示词的空白处仅填写1个适当单词，在给出提示词的空白处用括号内所给词的正确形式填空。     Water is a precious resource. Every person needs it (survive), and we use it for cooking, drinking, growing our food and washing. However，it is scarce (缺乏的). Just 1% of water on Earth can (use) by humans. What's more，treating water to make it clean and safe and pumping it to our homes uses up lots of energy. So, what can you do to help save water? One easy way is by(turn) off the tap when you brush your teeth. 答案：【1】to survive【2】be used【3】turning

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