问题补充：
1970 was the World Conservation(保护)Year. Everyone must know that the world is in danger. 16is one example of the 17.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), 18have been destroyed by modern man. We are changing the earth, the air and the water, and 19that grows and lives. If we go on like this , we shall destroy ourselves.
What will happen in the future? Perhaps 20is more important to ask “What must we do now?” The people who will be living in the world tomorrow are 21young of today. A lot of them know that conservation is necessary. Many are helping to save 22 .
Now fifteen million young people in many countries are studying 23and the country around him. In some countries they spend much time as “conservation volunteers.” They plant trees and help to 24wild birds and animals.
But everyone, 25young people, must work to save our world.
【小题1】A．HereB．ItC．HeD．There【小题2】A．troubleB．questionC．problemD．difficult【小题3】A．someB．othersC．the otherD．the others【小题4】A．everythingB．nothingC．somethingD．all things【小题5】A．thisB．thatC．oneD．it【小题6】A．aB．anC．/D．the【小题7】A．ourselvesB．our worldC．our livesD．living things【小题8】A．manB．menC．a manD．the men【小题9】A．findB．protectC．catchD．keep【小题10】A．not onlyB．exceptC． alsoD．together withA
答案：
(答案→)A
解析：
【小题1】这里就有一个有关环境问题的例子。故选A。
【小题1】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。
【小题1】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。
【小题1】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。
【小题1】考查固定句型。It is +形容词 to do sth.“做某事很......”。故选D。
【小题1】明天的人们是现在的年轻人。表示特指用定冠词the。故选D。
【小题1】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。
【小题1】man在此指“人类”。故选A。
【小题1】他们组成志愿者小组植树、保护鸟和野生动物。故选B。
【小题1】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。
