第 1 题答案与详解答案：1. C 2. B 3. A 4. B 5. B 6. C 7. C 8. B 9. A 10. C 解析：抱歉，暂无解析。
Water is very 1. to living things. Without water there can be no 2. on earth. All animals and plants need water. Man 3. needs water. We need water to drink, to 4. our food and to wash ourselves. Water is needed 5. offices, factories and schools. 6. else is water needed? Water 7. about seventy percent of the earth's surface. There is 8. in seas, rivers, and wells, but the polluted water in them is dangerous to people's health. So dirty water from 9. number of cities is now “cleaned” 10. it is used.
