1970 was World Conservation Year.The Unite Nations wanted everyone to know that the world is in danger.They hoped that governments would act quickly in order to“conserve”nature.Here is one example of the problem.At one time there were 1 000 different plants，trees and flowers in Holland，but now only 860 remain.The others have been destroyed by modern man and his technology.We are changing the earth，the air and water，and everything that grows and loves.We can’t live without these things.If we continue like this，we shall destroy ourselves.

What will happen in the future? Perhaps it is more important to ask，“What must we do now?”The people who will be living in the world of tomorrow are the young of today.A lot of them know that conservation is necessary.Many are hoping to save our world.They plant trees，build bridges across rivers in forests，and so on.In a small town in the United States a large group of girls cleaned the banks of 11 kilometers last Sundays in order to protect their surroundings.“No one’s going to change our world”is popular with others.It was made by the Scathes Cliff Richard and other singers.The money from it will help to conserve wild animals.

46.There are fewer plants，trees and flowers in Holland now because_______.

A.there has been a lot of conservation in Holland

B.Holland does not need so many plants，trees and flowers

C.many plants，trees and flowers can not grow there any more

D.some plants，trees and flowers are dangerous

47.We shall destroy ourselves if we don’t change_______.

A.the United Nations                                        B.modern technology

C.our rivers and forests                                     D.the government

48.“No one’s going to change our world”was_______.

A.an important book published in 1970

B.an idea that nobody would accept

C.a record calling on people to conserve nature

D.a ruler worked out by the United Nations

49.What is the most important thing for us to do to save our world?

A.We should plant more trees and flowers.

B.We should know what will happen in the future.

C.We should know it is necessary to conserve nature.

D.We should know what we must do and begin to do it now.

50.What’s the main idea of the passage?

A.1970 was the World Conservation Year.

B.Conservation is necessary.

C.It is the young people who are helping to save our world.

D.The United Nations wanted everyone to know that the world is in danger.

1970 was “World Conservation Year”. The United Nations wanted everyone to know that the world was in danger. They hoped that the governments would act quickly in order to conserve nature. Here is one example of the problem. At one time there were 1300 different plants, trees and flowers in Holland, but now only 860 remain. The others have been destroyed by modern man and his technology. We are changing the earth, the air and the water, and everything that grows and lives. We can't live without these things. If we continue like this, we shall destroy ourselves.?

What will happen in the future? Perhaps it is more important to ask “What must we do now?” The people who will be living in the world of tomorrow are the young of today. A lot of them know that conservation is necessary. Many are hoping to save our world. They plant trees, build bridges across rivers in forests and so on. In a small town in the United States a large group of girls cleaned the banks of eleven kilometres of their river. Young people may hear about conservation through a record called “No, One's Going to Change our World. ” It was made by Scatles, Cliff Richard and other singers. The money from it will help to conserve wild animals.?

There are few plants, trees and flowers in Holland now because _______.

A. there has been a lot of conservation in Holland?

B. Holland does not need so many plants, trees and flowers?

C. many plants, trees and flowers don't grow there any more?

D. some plants, trees and flowers are dangerous?

We shall destroy ourselves if we don't _______.

A. improve our technology in planting trees?

B. hear about the record called “No, One's Going to Change our World”?

C. try our best to save the world?

D. change the earth?

“No,One's Going to Change our World. ” was _______.

A. an important book published in 1970?

B. a record calling on people to conserve nature?

C. an idea that nobody would accept?

D. a rule worked out by the United States?

1970 was “World Conservation Year”. The United Nations wanted everyone to know that the world was in danger. They hoped that the governments would act quickly in order to conserve nature. Here is one example of the problem. At one time there were 1300 different plants, trees and flowers in Holland, but now only 860 remain. The others have been destroyed by modern man and his technology. We are changing the earth, the air and the water, and everything that grows and lives. We can't live without these things. If we continue like this, we shall destroy ourselves.?

What will happen in the future? Perhaps it is more important to ask “What must we do now?” The people who will be living in the world of tomorrow are the young of today. A lot of them know that conservation is necessary. Many are hoping to save our world. They plant trees, build bridges across rivers in forests and so on. In a small town in the United States a large group of girls cleaned the banks of eleven kilometres of their river. Young people may hear about conservation through a record called “No, One's Going to Change our World. ” It was made by Scatles, Cliff Richard and other singers. The money from it will help to conserve wild animals.?

There are few plants, trees and flowers in Holland now because _______.

A. there has been a lot of conservation in Holland?

B. Holland does not need so many plants, trees and flowers?

C. many plants, trees and flowers don't grow there any more?

D. some plants, trees and flowers are dangerous?

We shall destroy ourselves if we don't _______.

A. improve our technology in planting trees?

B. hear about the record called “No, One's Going to Change our World”?

C. try our best to save the world?

D. change the earth?

“No,One's Going to Change our World. ” was _______.

A. an important book published in 1970?

B. a record calling on people to conserve nature?

C. an idea that nobody would accept?

D. a rule worked out by the United States?

What is the most important thing for us to do to save our world?

A. We should clean the banks of our rivers.?

B. We should know what will happen in the future.?

C. We should know what we should do and do it now.?

D. We should plant more trees and flowers.?

The Three Gorges (三峡) Dam, the largest dam in the world, is also the largest engineering project on the face of the earth. It aims to make the mother of all floods, the Changjiang River, into a tame river and it will be the largest power source for much of eastern and central China. It will create a huge, deep-water lake, and make it possible for 10 000 ton ocean-going ships to sail 1 500 miles inland from the Pacific to the city of Chongqing with its 30 million people, making it the world's largest river port.

    Construction has already started. The dam will be about 6 860 feet long and 611 feet high, at a spot called Sandouping near Yichang.

    After many years of investigation (调研) experts have drawn a conclusion that this grand project will do a great deal of good. The most important thing is flood control. By building a dam instead of new coal plants to meet its growing demand for electricity, China will give off much less poisonous gases into the air.

    However, some scientists don't agree to the project. They say that Chongqing and dozens of other cities along the river will put much waste into the reservoir (水库) which can do harm to people, fish and other living thing that depend on the river. Sedimentation (沉积) and damage of a breach(决口)are problems, too.

    The Three Gorges Dam could be considered, when it is finished in 2009, a new eighth wonder of the world as to the size alone.

1．Which is not the purpose to build such a huge dam?

    A. To make electricity.

    B. To prevent floods.

    C. To improve navigation (运输).

    D. To make it a wonder.

2．Where does the dam lie?

    A. Near Chongqing.

    B. Near Yichang.

    C. In the Three Gorges.

    D. In Wuhan.

3．Some scientists fear that ________.

    A. when the dam is built, the balance of nature may be destroyed

    B. sedimentation may occur

    C. a breach may cause millions of people to die or to be homeless

    D. electricity will not be as much as expected

4．According to the passage, which of the following statements is NOT right?

    A. When finished, the dam will be one of the main bases of power source of China.

    B. People have different ideas about the setting up of the dam.

    C. It will take many years to build the dam because people want to see whether it will be safe and strong enough.

    D. Chongqing will become the largest river port in the world when the dam is finished.

A strong wind can be a dangerous thing — sometimes it is powerful enough to knock you off your feet. But to plants, the wind is a source of new life, carrying them or their spores (孢子) thousands of miles.

A NASA satellite called QuikSCAT has discovered highways of wind over the Earth's oceans. Scientists believe these invisible roads may explain why many nonflowering plants, such as mosses (苔) and lichens (地衣), grow where they do.

The satellite is able to send microwaves (微波) from space to the surface of the ocean. The pattern of signals that come back shows which way the winds are blowing.

Using this data, the scientists studied a group of islands in the southern hemisphere (半球), near Antarctica．Winds tend to blow anticlockwise (逆时针) in this region, but there are lots of local differences.

When the researchers compared these local patterns to botanical (植物学) data, they found that the wind had an important effect on where species of mosses, lichens, and other nonflowering plants grow.

For example, Bouvet Island and Heard Island, share 30 per cent of their moss species, 29 per cent of liverworts (叶苔), and 32 per cent of lichens — even though they are 4,430 kilometers apart. In contrast, Gough Island and Bouvet Island, separated by just 1,860 kilometers of sea, share only 16 per cent of mosses and 17 per cent of liverworts. They have no lichens in common.

Ferns (蕨类植物) and flowering plants don't travel as well in the wind, so they don't show the same kinds of distribution (分布) patterns.

This story is about _____.

       A．the discovery of wind highways    B．how wind travels

       C．how wind affects different plants        D． one function of the wind

The underlined word "data" in the fourth paragraph means _____.

       A．signal     B．pattern      C．information      D． research

Which of the following is wrong?

       A．Bouvet Island, Heard Island and Gough Island are all in the southern hemisphere.

       B．Winds in the researched area blow anti-clockwise.

       C．The scientists shouldn't base this research on how winds affect where ferns grow.

       D． Without the discovery of QuikSCAT, the research wouldn't have made sense.

Which of the following diagrams shows the correct position of the islands?