Water is very important to living things. Without water there can be no life on the earth. All animals and plants need water. Man also needs water. We need water to drink, to cook our food and to clean ourselves. Water is needed in offices, factories and schools. Water is needed everywhere.
There is water in seas, rivers and lakes. Water is found almost everywhere. Even in the desert part of the world, there is some water in the air. You can not see or feel it when it is a part of the air. The water in the seas, rivers and lakes is a liquid, the water in the air is a gas, and we call it water vapour (蒸气).
Clouds are made of water. They may be made of very small drops of water. They may also be made of snow crystals(结晶体). Snow crystals are very very small crystals of ice. Ice is frozen water. It is a solid. There can be snow and ice everywhere in winter.
Water may be a solid or a liquid or a gas. When it is a solid, it may be as hard as a stone. When it is a liquid, you can drink it. When it is a gas, you can not see or feel it.
【小题1】Where can we find water?

A new study gives us the warning that about thirty percent of the world's people may not have enough water by the year 2025.
A private American organization called Population Action International did the new study. It says more than three-hundred-thirty-five-million people lack enough water now. The people live in twenty-eight countries. Most of the countries are in Africa or the Middle East.
P-A-I researcher Robert Engelman says by the year 2025, about three-thousand-million people may lack water. At least 18 more countries are expected to have severe water problems. The demand for water keeps increasing. Yet the amount of water on Earth stays the same.
Mr. Engelman says the population in countries that lack water is growing faster than in other parts of the world. He says population growth in these countries will continue to increase.
The report says lack of water in the future may result in several problems. It may increase health problems. Lack of water often means drinking waters not safe. Mr. Engelman says there are problems all over the world because of diseases, such as cholera, which are carried in water. Lack of water may also result in more international conflict. Countries may have to compete for water in the future. Some countries now get sixty percent of their fresh water from other countries. This is true of Egypt, the Netherlands, Cambodia, Syria, Sudan, and Iraq. And the report says lack of water would affect the ability of developing to improve their economies. This is because new industries often need a large amount of water when they are beginning.
The Population Action International study gives several solutions to the water problem. One way, it says, is to find ways to use water for more than one purpose. Another way is to teach people to be careful not to waste water. A third way is to use less water of agriculture.
The report also says long-term solutions to the water problem must include controls on population growth. It says countries cannot provide clean water unless they slow population growth by limiting the number of children people have.
【小题1】__________ are expected to have severe water problems by the year 2025

It is important to do with the rubbish in cities. Rubbish must be 1.____________

treated properly. Thus, it may cause a lot of prob??lems. It may pollute     2.____________

the air and water. When people breathe the polluted air or drink polluted  3.____________

water, we may get ill. Our city has begun to pay attention to the roblem.   4.____________

As far as I know, some rubbish is sorted and sent to different facto??ry.          5.____________

Rubbish, such as old newspapers and glass, are recycled. Some harmful    6.____________

rubbish is sent to a certain place and buried. Waste air is cleaned after it    7.____________

goes into the air. Waste water is treated before it poured into rivers. To     8.____________

protect from the environment, the government has passed laws to          9.____________

prevent people from throwing rubbish everywhere. We should do our          10.___________

best to take good care of the environment and fight against pollution.

C
Some experts feel that cars are certain to fall into disuse. They see a day in the not-too-distant future when all cars will be deserted and made useless. Other experts, however, think the car is here to stay. They hold that the car will remain a leading means of city travel in the foreseeable future.
The car will undoubtedly change greatly over the next 30 years. It should become smaller, safer, and more practical, and should not be powered by the gas engine. The car of the future should be far more pollution-free than present types.
Unless changes take place in the power system, the car in the future will still be the main problem in city traffic jams. One suggested solution to this essential problem is the automated (自动的) system, which seems to hold water.
When the car enters the highway system, a small arm will drop from the car and connect with a rail, which is similar to those powering subway trains electrically. Once joined to the rail, the car will become electrically powered from the system, and control of the car will pass to a central computer. The computer will then monitor all the car’s movements. The driver will use the telephone to dial instructions about his position and the place he heads for into the system. The computer will find the best way and reserve space for the car all the way to the correct exit from the highway. The driver will be free to relax and wait for the call that will warm him of his coming exit. It is believed that an automated highway will be able to deal with 10,000 cars per hour, compared with the 1,500 to 2,000 cars that can be carried by a present-day highway.
48. What is the main concern of the author of the passage?
A. How to make cars pollution-free.            B. How to make cars smaller and safer.
C. How to solve the problem of train jam.   D. How to develop an automated subway system.
49. We can infer from this passage that __________.
A. the car connected to the rail on the highway will be powered by electricity.
B. The lack of oil is forcing people to find new means to power automobiles.
C. The driver under the system will be told where to get out of the highway.
D. The future car will become larger, faster, prettier and less expensive.
50. What provides cars with electric power in an automated highway system?
A. An engine.        B.A rail.   C. A computer controller.            D. A small arm.
51. Which of the following statements is true according to the passage?
A. The driver puts his information in the system by email.
B. The new system can deal with 10 times as many cars as the present one.
C. After entering the automated system, the driver needs to do nothing but relax.
D. Some experts are not confident of the future, while the view of the author is hopeful.

It's time you started eating sensibly. Experts at the first Chinese Students Nutrition and Health Festival in Kunming last week listed eight bad eating habits.

    ●Watching television while having meals or snacks.

    Doing this means you don't pay attention to your food, forget how full you are, and so overeat. It can also cause digestion (消化) diseases. One way to avoid this is only to eat in certain areas of your home.

    ● Replacing meals with snacks.

    Many students think that eating small snacks can help them diet. But it often results in overeating and health problems related to a lack of vegetables, carbohydrates (碳水化合物),proteins and vitamins. Snacking only works if it is well planned and includes healthy foods such as nuts, vegetables, fruit and yogurt.

●Having drinks rather than water.

Fizzy (有气泡的) drinks and fruit juice are usually high in calories and sugar, which can

cause weight problems. Water is important in making your brain cells and every organ in your body work properly. For your body to burn fat, it needs at least eight glasses of pure water a day. Liquids like soda and coffee actually take water away from your body.

●Refusing to drink milk.

Milk is the best natural food—it provides you with protein, which makes your bones strong and teeth healthy.

    ● Choosing meat and certain vegetables over others.

    Different foods provide different kinds of nutrition. If you don't have a balanced diet, this can result in malnutrition (营养失调) and a weaker body.

●Eating in front of the computer and staying there after meals.

Take a walk after eating and it helps your stomach digest the meal.

●Buying from roadside snack bars.

If you shop at these places, be careful—many are not clean enough.

    ● Eating throat tablets as if they were sweets.

    If you eat throat tablets when you have no throat disease, they may affect the bacteria in your mouth and cause real throat problems.

______ can possibly cause digestion problem.

A. Eating while sitting in front of TV or computer

B. Eating throat tablets as if they were sweets.

C. Choosing certain kinds of food over others.

D. Buying from roadside snack bars.

Why can't soft drinks be drunk in place of water when you feel thirsty?

A. They help brain cells work properly.      B. They make your body sick.

C. They take water away from your body.    D. They supply energy for your body.

Which of the following is NOT the habit that will possibly result in a lack of nutrition?

A. Often eating small snacks.            B. Never drinking milk.

C. Always eating the same kinds of food.   D. Staying in front of a computer after the meal.