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1970 was World Conservation（保护）Year. The United Nations wanted everyone to know that the world was in danger. They hoped something could be done.

Here is one example of the problem. At one time there were 1,300 kinds of plants, trees and flowers in Holland（荷兰）,but now only 866 are left. The others have been destroyed（毁灭）by modern people and their science. We are polluting earth, air, water and everything around us. We can’t live without these things. If things go on like this, we shall destroy ourselves.

What will happen in the future? Perhaps it’s more important to ask “What must we do?” More and more young people have known this. Many of them are helping to save our earth. For example, they plant trees. In a small town in the United States, a large group of girls cleaned the banks of 11 kilometers of their river. Young people may hear about conversation through a song called “No one’s going to change our world”. It was made by Cliff Gichard and other singers. The money from it will help to conserve tigers, elephants and pandas on the earth.

1.The United Nations hoped something could be done      .

A. to conserve the world        B. to change the world

C. to develop the world          D. to destroy the world

2.Why aren’t there so many plants, trees and flowers in Holland now?   Because    .

A. people there didn’t need so many plants, trees and flowers.

B. people there want to destroy themselves

C. little conservation has been done there

D. people need more land to live on

3.How many kinds of plants, trees and flowers have been destroyed in Holland?

A. 1300        B.988          C.3166    D.434

4.We shall destroy ourselves if we go on    .

A. Planting trees and flowers

B. polluting earth, air and water around us

C. saving the world

D. helping to conserve tigers, elephants and pandas

5.What must we do now according to the passage?

A. Save the world   B. Clean the banks of river

C. Sing songs       D. Get money