题目内容
Much less than one percent of the earth's water can be used by humans. Areas that need a lot of water often have to bring it in from far away. For example, southern and central California get most of their water from northern California. The Middle East and Mexico are among the places where large areas are short of water. Much of the shortage (短缺) in such places is caused by poor use of water, such as pollution and waste.
Most places have enough water for drinking, farming and industries. However, as cities grow larger and industries expand, more and more water is needed. This may mean that more sources (来源) of water need to be found. But by saving water, existing (现有的) water can be used longer. This allows towns, cities and industries to grow without the need to find more water sources.
What are some ways that ordinary people can save water?
A survey shows that washing clothes, taking showers and using toilets make up about 80 percent of a family's water usage. So using showerheads, toilets, and taps that use less water can help save a lot of water in the home.
( ) 53. One of the possible reasons why Middle East and Mexico are short of water is that ________.
A. many industries in these places use a lot of water
B. they pollute and waste existing water
C. they have few lakes and rivers
D. they don’t have enough money to buy water
( ) 54. What's the meaning of the underlined word "expand"?
A. 发展 B. 使用 C. 浪费 D. 匮乏
( ) 55. According to the survey, which probably use the least water in families?
A. Taking showers. B. Using toilets.
C. Washing dishes. D. Washing clothes.
( ) 56. Which of the following can we learn from the passage?
A. By saving water, we may not need to find more water sources.
B. People in southern and central California are rich.
C. Northern California will not have enough water in the future.
D. Washing clothes and washing dishes make up 40 % of a family's water usage.
BACA
名师指导期末冲刺卷系列答案During the day, you spend a lot of time running, jumping, laughing, eating, and talking. You use up a lot of energy(能量) , and by the end of the day you're tired. Sleep gives your body a chance to rest.
But your brain (大脑)and body are not completely at rest during sleep. While you sleep, your mind may think of the things that happened during the day. It keeps the important things in mind as memories(记忆). It also thinks about things you were worrying about, and you may wake up with answers to some of your problems.
You also grow while you sleep. The thing called "human growth hormone (荷尔蒙)" in the body helps you grow during sleep. This growth hormone also helps the body to repair itself.
Sleep helps your body to conserve energy too. You use up a lot of energy during your daily activities. But when you sleep, your body temperature falls, and your "metabolism" (新陈代谢) slows down. You are still using some energy, but much less than when you are awake and active.
Have you ever stayed up past your bedtime? Did you have difficulty getting up the next morning? Maybe you had problems seeing clearly or you cannot think clearly. That was your body's way of saying, "I need sleep！" A lack ( 缺乏) of sleep can stop your body and mind from working correctly.
【小题1】What does "human growth hormone" do while people sleep?
| A．It helps people rest well. | B．It helps repair the body. |
| C．It helps answer problems. | D．It helps slow the body down. |
| A．You use up a lot of energy. | B．You enjoy daily activities. |
| C．Your body temperature falls. | D．You don't want to get up. |
| A．provide | B．move | C．save | D．spend |
| A．Sleep is very important. | B．The brain needs enough sleep. |
| C．Good ways to sleep well. | D．People use energy when sleeping |
Helen spent ______ time studying English than I did.
| A．more little | B．a little | C．very less | D．much less |
