___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.

完形填空：

　Most people in the United States speak English. There are over 2,000 languages（语言）spoken throughout the world. You know that every language has 　1　 own words. 　2 　you want to learn a foreign language（外国语）, you must learn its words. You must know 　3 　the words mean（意思）, and you must say them in the 　4 　. Words are 　5 　up of（由…组成）sounds（语音）, and different language have different sounds. There are thousands of language sounds. When you 　6 　English, you are using only about fifty of them.

　Some languages are spoken faster than 　7 　. English is spoken 　8 　slowly than French. Women speak 　9 　than men. In America, women speak about 175 words every minute, 　10 　men speak about only 150. How many words every minute do you speak?

________由1笔写成。

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