学进去

1970 was World Conservation Year. Everyone must know that the world is in danger. _______ is one example of the _______. At one time there were 1300 different kinds of trees and flowers in Holland (荷兰), but now only 866 remains (继续存在). _______ have been destroyed (毁坏) by modern man. We are changing the earth, the air and the water, and _______ that grows and lives. If we go on like this, we shall destroy ourselves.

What will happen in the future? Perhaps _______ is more important to ask “What must we do now?” The people who will be living in the world tomorrow are _______ young of today. A lot of them know that conservation is necessary. Many are helping to save _______.

Now fifteen million young people in many countries are studying _______ and the country around them. In some countries they spend much time as “conservation volunteers”. They plant trees and help to _______ wild birds and animals.

But everyone, ________ young people, must work to save our world.