题目内容
15．（36）CThere 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（37）F．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．（38）DHowever，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．
（39）A 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．（40）G the world population will not rise so quickly if people use modern methods of birth control．Finally，if we educate people to think about th 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．
分析 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，也知道如果过多的砍伐树木会造成森林的小事，然而人们还是这样做了，作者对此类现象进行了分析，并提出了相应的解决办法．
解答 36．C 推理题．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，结合选项，C项中 in the past，man didn't have to think about…也是讲述过去的事，故选C
37．F 推理题．上文作者提到The world has become too crowded．We are using up our resources too quickly，and at the same time we are polluting 世界人口的激增与污染等问题，结合选项，F 的内容涉及到了这些现象的后果，起到承上启下的作用，故选F
38．D 细节题．根据副词however可知此处的内容是关于污染的，而且和in most countries waste products are still put into rivers or into the sea构成转折关系，故选D
39．A 细节题．根据文章内容．在本段提到了一些解决问题的方法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．，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，因此要多吃蔬菜，控制人口等．选项A能够起到引领下文的作用，故选A
40．G推理题．根据文章内容，作者提出的解决方法比如控制人口等，而G选项中的"学会资源再利用‘'也是解决方法之一，再结合选项，故G正确．
点评 题目涉及多道细节理解题，做题时结合原文和题目有针对性的找出相关语句进行仔细分析，推理判断题也是要在抓住关键句子的基础上合理的分析才能得出正确答案，切忌胡乱猜测，一定要做到有理有据．
