6．A new study warns 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 335million people lack enough water now．The people live in 28countries．Most of the countries are in Africa or the Middle East．
P-A-I researcher Robert Engelman says by the year 2025，about 3，000million people may lack water．At least 18more 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．
63．The first four paragraphs mainly tell usA．
A．the fact of the global lack of water
B．the importance of water resources
C．the seriousness of water shortage
D．the study of the global water condition
64．Which of the following problems is NOT true about lack of water according to the passage？C
A．It may bring about a lot of health problems．
B．It may result in more international conflict．
C．It may lead to the improvement of new industries．
D．It may influence the development of the economics．
65．Which of the following is the way to solve water problem in the long run？D
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．
66．Which of the following shows the structure of the passage？B
A．①②③→④⑤→⑥⑦B．①②③④→⑤→⑥⑦
C．①②③④→⑤⑥→⑦D．①②③→④→⑤→⑥⑦
