题目内容：

请认真阅读下列短文，从短文后各题所给的A、B、C、D四个选项中，选出最佳选项，并在答题卡上将该项涂黑。

A new study warns that about 30% of the world people may not have enough water by the year 2025.

A private American organization called Population Action International (PAI) did the new study. It says more than three hundred and thirty-five million people lack enough water now. These people live in twenty-eight countries. Most of the countries are in Africa or the Middle East.

PAI researchers Robert Engelman says by the year 2025， about three thousand million people may face water problems. At least 18 more countries are expected to lack enough water. The need for water keeps increasing. Yet the amount(数量) of water on the earth stays the same.

The report says lack of water in the future may cause 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 lead to more international conflict(冲突). Countries may have to fight for water in the future. Some countries now get sixty percent of their water from other countries. This is true of Egypt， the Netherlands， Cambodia， Syria， Sudan， and Iraq. And the report says lack of water would influence the ability to improve their economies(经济). This is because new industries often need a great 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 for agriculture.

The report also says a long-term solution to the water problem is to control population growth. It says countries cannot provide clean water unless they slow population growth by limiting the number of children people have.

1. The PAI study shows that       countries will lack water by the year 2025.

A. at least 46          B. at most 46

C. 18                  D. 28

2. Which of the following problems is NOT true according to the passage?

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

B. It may cause more international conflict.

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

D. It may influence the development of economies.

3. What is the way to solve the water problem in the long term?

A. To use water in different ways.

B. To realize the water problem.

C. To reduce water for farming.

D. To limit the rising birth rate.

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

A.①②→③④→⑤⑥          B.①②③→④→⑤⑥

C.①②③④→⑤→⑥          D.①②③→④→⑤→⑥

5. After reading the passage， many people will probably       .

A. begin to fight for water

B. try to find ways to save water

C. increase the amount of water

D. move house to the Middle East