1970 was the World Conservation(保护)Year. Everyone must know that the world is in danger.1 is one example of the2.At one time there were 1,300 different kinds of trees and flowers in Holland(荷兰),but now only 866 remain(继续存在),3have been destroyed by modern man. We are changing the earth, the air and the water, and 4that grows and lives. If we go on like this , we shall destroy ourselves.
What will happen in the future? Perhaps5 is more important to ask “What must we do now?” The people who will be living in the world tomorrow are6young of today. A lot of them know that conservation is necessary. Many are helping to save7.
Now fifteen million young people in many countries are studying8 and the country around him. In some countries they spend much time as “conservation volunteers.” They plant trees and help to9 wild birds and animals.
But everyone,10young people, must work to save our world.

1.
1. A.
  Here
2. B.
  It
3. C.
  He
4. D.
  There
2.
1. A.
  trouble
2. B.
  question
3. C.
  problem
4. D.
  difficult
3.
1. A.
  some
2. B.
  others
3. C.
  the other
4. D.
  the others
4.
1. A.
  everything
2. B.
  nothing
3. C.
  something
4. D.
  all things
5.
1. A.
  this
2. B.
  that
3. C.
  one
4. D.
  it
6.
1. A.
  a
2. B.
  an
3. C.
  /
4. D.
  the
7.
1. A.
  ourselves
2. B.
  our world
3. C.
  our lives
4. D.
  living things
8.
1. A.
  man
2. B.
  men
3. C.
  a man
4. D.
  the men
9.
1. A.
  find
2. B.
  protect
3. C.
  catch
4. D.
  keep
10.
1. A.
  not only
2. B.
  except
3. C.
  also
4. D.
  together with

ACDAD DBABA
1.这里就有一个有关环境问题的例子。故选A。
2.problem通常指生活上遇到的难题、麻烦；而question指的是学习上的问题。故选C。
3.1300种树和花中的866种存活，剩下的已经被人类破坏灭绝。some“一些”；others泛指“一些”；the other“另一个”；the others“剩下的全部”，故选D。
4.我们在改变着地球、空气、水还有其他一切有生命的生物。故选A。
5.考查固定句型。It is +形容词 to do sth.“做某事很......”。故选D。
6.明天的人们是现在的年轻人。表示特指用定冠词the。故选D。
7.很多年轻人都知道保护环境是必要的，他们中的很多页正在帮忙拯救我们的世界。且根据文章最后一句话可知，用our world。故选B。
8.man在此指“人类”。故选A。
9.他们组成志愿者小组植树、保护鸟和野生动物。故选B。
10.不仅是年轻人，每个人都必须切实行动起来拯救我们的世界。故选A。

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1970 was “World Conservation(保护) Year”. The United Nations wanted everyone to know that the world is at risk(危险).They hoped that people would do something quickly to conserve nature.

Here is one example of the problem. At one time there were 1,300 plants, trees and flowers in Holland, but now only 860 are existing. The others have been destroyed by modern man and his technology.

Here is another example. In 1620, about half the USA was covered by forests. In 1850, about a third was covered by forests. Today the forests have almost gone. A lot of good land has gone with them, leaving only sand. Today too many trees are still being cut down.

We’re changing the earth, the air and water. We can’t live without these things. If we go on like this, we shall destroy ourselves. A lot of people know that conservation is necessary. Many things have been done to save our world. For example, people plant more and more trees on the hills. In a small town in the USA a large group of girls cleaned the banks of 11 kilometers of their river. Young people may hear about conservation through a record by the name of NO ONE’S GOING TO CHANGE OUR WORLD. It was made by Scales, Cliff Richard and other singers. The money from it will help to conserve wild plants and animals. In China, a new Great Wall has been built across the northern part of the country to stop the sand from moving towards the rich farmland in the south.

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______________________________________________________________

2.What did the United Nations hope ?

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3.How much land in the USA is covered by forests in 1850?

______________________________________________________________

4.Can you give us an example that people have done to save our world?

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