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题型:填空题 题类:模拟题 难易度:普通

The most important drink is water. Not many people understand this but it is quite t. People can for a long time without food, but they will die if two or three days water. In h weather, many people do not drink e water, because they don't know how much water they n. After t exercise, people need more water.
The water in man's body is m more than other matters(物质). We'd better have enough water, or we may get . Water is n to all the living things. There will be no l if there is no water.
So we must save water and don't w water.

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