问题补充：
_【小题1】There were few people on the earth, and natural resources seemed to be unlimited. Today things are different. The world has become too crowded. We are using up our resources too quickly, and at the same time we are polluting our environment with dangerous chemicals _【小题2】.
Everyone realizes today if too many fish are taken from the sea, there will soon be none left. Yet, with modern fishing methods, more and more fish are caught. We know that if too many trees are cut down, forests will disappear and nothing will grow in the land. Yet , we continue to use bigger and more powerful machines to cut down more and more trees. __【小题3】__ However, in most countries waste products are still put into rivers or into the sea, and there are few laws to stop this. We know, too , that if the population of the world continues to rise, in a few years, there will not be enough food.www..com
_【小题4】_ If we eat more vegetables and less meat, there will be more food available for everyone. Land that is used to grow crops feeds five times more people than land where animals are kept. __【小题5】_ the world population will not rise so quickly if people use modern methods of birth control. Finally, if we educate people to think about the problems, we shall have a better and cleaner planet in the future.A．What can we do to solve these problems?B．So we should try our best to protect the environment.C．In the past, man didn’t have to think about the protection of his environment.D．We realize that if the rivers are polluted with waste products from factories, we will die.E. Why do some people do so foolish things?
F. If we continue to do this, human life won’t survive in the future.
G. Out natural resources will last longer if we learn to recycle them.C
答案：
(答案→)C
解析：本文通过现在与过去情况的对比,提出了保护环境的重要性。人们知道捕鱼太多会造成渔业资源的枯竭，也知道如果过多砍伐树木会造成森林的消失，更知道过量的废物排放会造成河流的污染,然而人们对此还是明知故犯，作者对此类现象在文中进行了分析,而且提出了相应的解决方法。
【小题1】C考查对上下文的推理判断能力。根据下文There were few people on the earth, and natural resources seemed to be unlimited.可知此处是讲述过去的情况,而C选项In the past, man didn’t have to think about…..也是讲述过去的状况，所以C选项内容符合语境,故答案选C.
【小题2】F考查对上下文的推理判断能力。上文作者提到世界人口的激增与污染等问题,纵观选项,F项内容涉及到了这些现象的后果,故能承接上文,答案选F.
【小题3】D考查对上下文的推理判断能力。根据副词 However可知此处内容是关于污染的,而且和in most countries waste products are still put into rivers or into the sea构成转折关系,故答案选D.
【小题4】A考查对上下文的推理判断能力。在本段中作者提到了一些解决问题的方法,比如生产粮食的土地比饲养动物的土地能够养活更多的人,因此人们要多吃蔬菜,少吃肉, 以及控制人口增长等,由此判断A选项内容能够起到引领下文的作用,故答案选A.
【小题5】G考查对上下文的推理判断能力。作者在本段中提到了一些解决问题的方法,比如控制人口增长等 ，而G选项”学会资源再利用”也是解决问题的方法之一,内容符合语境,由此判断G为正确选项.
