A. Read the text carefullyEight glasses of water a day keep the doctor away.

Water is very important for any kinds of living things. Humans can live more than two weeks without food. However, they can only live for eight to ten days without water. Water goes around the body through blood. It carries oxygen and food for cells. It cleans the body by bringing the waste in sweat or urine. It also keeps the balance of minerals in the body. Most parts of human body use water to work. Someone cannot move well if there is not enough water in his or her body.
Sixty five percent of human body is water.
To keep that amount of water in the body, someone must drink an average of eight to ten glasses of water each day. How much water does a person need every day ? It depends on the volume of urine and sweat. An athlete who does a lot of physical exercise certainly needs to drink more water than a bank manager who spends most of his time in the office. Besides drinking, many kinds of food are also a good source of water. Fruit and vegetable, for instance, is eighty to ninety five percent of water.

B. Answer the following questions.
1. What is important for living things ?
2. How long will humans live if they don't
eat ?
3. How long will humans live if they don't
drink any water ?
4. What does water carry through blood ?
5. How does water clean our body ?
6. It also keeps the balance of minerals in
the body. It refers to....................................
7. How much water do we need each day ?
8. Why does an athlete need more water
than a bank manager ?
9. How can we keep water in our body ?
10. What is the meaning of the title ?
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