What's the main idea of the passage？
A. If it continues like this, we shall destroy ourselves.
B. It is necessary to conserve our nature.
C. 1970 was World Conservation Year.
D. The singers helped to save our world.
查看答案
In summer many Americans would like to travel to other countries and they hope to______.
A. breathe the fresh air
B. look for a better job
C. establish friendship
D. find a trusted confidant
If we don't______, we shall destroy ourselves.
A. change the water, air and the earth
B. improve our technology
C. try our best to save the world
D. educate people
Why there are fewer plants, trees and flowers in Holland now？
A. Because there has been a lot of pollution there.
Because there was a shortage of water.
C. Because many plants, trees and flowers have been destroyed.
D. Because Holland does not need so many plants, trees and flowers.
In this passage a "friend" can be______.
A. a workmate
B. a football teammate
C. a boy or a girl
D. all of the above
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