阅读理解。
Of all the things we eat and drink, water is the most important. Not many people realize this but it is quite
true. The human (人类的) body goes without food for a long time, but two or three days without water usually
results in death.
Many people do not understand how much water the human body needs to work properly and many people
do not drink enough, especially in hot weather. Most people drink when they are thirsty, but we often need
more water, especially if we have been taking exercise.
A man's body is 65 to 75 percent of water. Most people need about five to seven liters of water every day,
but we do not need to drink this amount (数量) because a lot comes from the food we eat. Or we do not have
enough water, we feel thirsty and may become ill. Do you know what the best drink is? Yes, cold water.
1. Which of the following is true?
A. No one knows water is the most important thing to human life.
B. It's quite true that water is very important to human life.
C. It's dangerous to drink plenty of water when we are thirsty.
D. People should stop drinking water in order to keep healthy.
2. In order to get enough water, the writer thinks people should drink _____.
A. hot water
B. after exercises
C. often, not just when they feel thirsty
D. as much water as possible
3. According to the passage, a person usually drinks _____ of water every day.
A. 65 to 75 percent
B. no more than 5 litres
C. more than 7 litres
D. no more than 7 litres
4. People get the water they need from _____.
A. the food they eat
B. the things they eat and drink
C. cold eater
D. their drink
5. The passage mainly wants to make people know _____.
A. that they should drink enough water
B. why water is important to them
C. how much water they need
D. how they can get enough water

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