Of all the things we eat and drink, water is the most important. Not many people understand this, but it is quite true. The human body can go without food for a long time, but two or three days without water usually make people dead.

Many people don’t know how much water the human body needs and they don’t drink enough, especially (尤其) in hot weather. Most people drink when they feel thirsty. They often need more water especially when they have sports.

A man’s body is 65 to 70 percent (百分之……) water. If we don’t have enough water, we may feel tried and may become ill.

Now you can see how important the water is!

1. Which is more important for human body, food or water?

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2. Can the human body go without water for a long time?

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3. When do most people drink?

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4. What percentage (百分比) of a man’s body is water?

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5. How may you feel if you don’t have enough water?

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　　___1___all the things we eat and drink, water is the ___2___ important. Not ___3___ person understands this, but it is quite ___4___. The human body can go without food for a long time, __5___ without water we'll be ill or die within two or three days.

　　Many people do not know ___6___ water the human body needs to work and they don't drink ___7___ water. Most people drink only when they ___8___ thirsty. But in fact（实际上）they often need ___9___ water, especially when they have done sports.

　　A man's body is made up of（由……组成）65 to 75 percent（百分比）of water. If we do not have enough water, we feel tired and ___10___ ill.

Class, of all the things we eat and drink, water is the   1   important．Not   2   people understand this but it is quite true．The human body can go   3   food for a long time, but two   ___4   three days without water usually make people   5 ．Many people do not understand how   6   water the human body needs   7   well and many people do not drink   8  , especially in hot weather．Most people drink when they are thirsty but often need more water, especially when they take exercises．

A man's body is 65 to 70 percent water．If we do not have   9   water, we feel   10  and may become ill．Do you know what the best drink is?

1．A．most                   B．much               C．least                       D．more

2．A．few                    B．many              C．lot of                D．much

3．A．with                    B．on                   C．without             D．by

4．A．and                    B．or                  C．but                 D．of

5．A．died                  B．to die                 C．dying                D．die

6．A．much                  B．little                   C．many                     D．can

7．A．work                  B．to work              C．working            D．works

8．A．enough                 B．fast                  C．more               D．full

9．A．some                  B．a little                  C．all                  D．enough

10．A．fine                   B．tired                 C．happy              D．well

完形填空。

　　 1 all the things we eat and drink water is the 2 important (重要). Not 3 people understand (明白,懂) this, but it is quite 4 . The human body can go without food for a long time, 5 two or three days without water usually make people die.

　　Many people do not understand 6 water the human body (人体) needs to work and they do not drink 7 water especially (特别是) in hot weather. Most people drink only when they 8 drink. But in fact (实际上) they often need 9 water especially when they have had sport.

　　A man's body is 65 to 75 percent (百分比) water. If we do not have enough water, we feel tired (累) and 10 ill (病).

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