P-A-I researcher Robert Engelman says by the year 2025, about 3,000 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 the 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 water is 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.

　　　12．The first four paragraphs mainly tell us .

　　　A．the study of the global water condition B．the fact of the global lack of water

　　　C．the seriousness of water shortage D．the importance of water resources

　　　13．Which of the following problems is NOT true about lack of water according to the passage?

　　　A．It may influence the development of the economics.

　　　B．It may bring about a lot of health problems.

　　　C．It may result in more international conflict.

　　　D．It may lead to the improvement of new industries.

　　　14．Which of the following is the best way to solve water problem in the long run?

　　　A．To use water in a variety of ways. B．To become aware of the water problem.

　　　C．To reduce the use of agricultural water. D．To limit the rising birthrate of the earth.

　　　15．Which of the following shows the structure of the passage?

　　　A． B．

　　　C． D．

二、七选五

　　　Each year there is an increasing number of cars on roads and streets as millions of new cars and trucks are produced. One out of every six Americans work at putting together the parts of cars, driving trucks, building roads or filling cars and trucks with gas. 16．. Because most Americans find they are using their cars in almost every aspect of their life. 17．. The polluted air becomes poisonous and dangerous to health.

　　　18．. That's what several of the large car factories have been trying to do. But to build a clean car is easier said than done. Progress in this field has been slow.

　　　Another way is to take the place of the car engine by something else.19．. Many makers believe that it will take years to develop a practical model that pleases man.

　　　To prevent the world from being polluted by cars, we'll have to make some changes in the way many of us live. Americans, for example, have to cut down on the number of their total cars. They are encouraged to travel and go to work by bicycle. Bicycling is thought to help keep the air clean. But this change does not come easily. A large number of workers may find themselves without jobs if a car factory closes down.20．.

　　　Although cars have led us to a better life, they have also brought us new problems.

　　　A．Americans know cars very well.

　　　B．Americans won't live without cars!

　　　C．Inventors are now working on steam cars as well as electric cars.

　　　D．However, the number of vehicles has continued to increase in recent years.

　　　E. One way to get rid of the polluted air is to build a car that does not pollute.

　　　F. Thus the problem of air pollution would become less important than that of unemployment.

G. However, some have realized the serious problems of the air pollution that is caused by cars.