单选题 Everyone ought to know that the world is in danger. It is hoped that every government should act quickly in order to conserve (保护) nature. Here is one example of the problem. At one time there were 1,300 different plants, trees and flowers in Holland, but now only 866. The others have been destroyed by modem man and his technology. We are changing the earth, the air and the water, and everything that grows and lives~ We cannot live without these things either.
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 helping to save our world. In some countries young people spend their spare time as "conservation volunteers". They plant trees, build bridges across rivers in forests, and so on. In a small town in United States a large group of girls cleaned the banks of eleven kilometers of their rivers. Young people may hear about conservation through a record called "No One's Going to Change Our World". It was made by Cliff Richard and his singing group. The money from it will help to conserve wild animals.

单选题 The example of Holland in the first paragraph shows that ______.

单选题 Which of the following would be an action of conserving nature?

单选题 The underlined word "volunteer" in paragraph 2 are people ______.

单选题 The record "No One's Going to Change Our World" will ______.