完形填空Inthepast,mandidnothavetothink

完形填空 In the past, man did not have to think about the protection of his environment. There were few people on the earth, and natural1seemed to be unlimited.Today things are2. The world has become too3. We are4our natural resources too quickly, and at the same time we are5our environment with dangerous chemicals. If we6to do this, human life on earth will not7.People realize today that if too many8are taken from the sea, there will soon be none left. Yet, with modern fishing9, more and more fish are caught. We know that if too many trees are cut down,10will disappear and nothing will11on the land. Yet, we continue to use bigger and more powerful machines to12more and more trees.We realize that if rivers are polluted with waste products from factories, we will die.13, in most countries waste products are still put into rivers or into the sea, and there are few laws to 14this.We also know that if the15of the world continues to rise at the present rate, in a few years, there won't be enough food. What can we do to solve the16? If we eat more vegetables and less17, 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.Our natural resources will 18longer if we learn to recycle them. The world population will not19so quickly if people use modern methods of birth control.Finally, if we20people to think about the problems we shall have a better and cleaner planet in the future.1.A.resourcesB.sourcesC.materialsD.matter2.A.commonB.the sameC.changeableD.different3.A.crowdedB.pollutedC.dirtyD.busy4.A.producingB.using upC.reducingD.making5.A.protectingB.savingC.pollutingD.fighting6.A.tryB.continueC.stopD.have7.A.liveB.lastC.continueD.survive8.A.fishB.seagullsC.crocodilesD.frogs9.A.polesB.boatsC.methodsD.ideas10.A.mountainsB.the seaC.cropsD.forests11.A.growB.plantC.saveD.cut down12.A.plantB.cut downC.saveD.burn down13.A.ThusB.HoweverC.Generally speakingD.Therefore14.A.encourageB.neglectC.stopD.wake up15.A.productionB.pollutionC.populationD.revolution16.A.pollutionB.environmentC.questionsD.problems17.A.fruitB.meatC.fishD.grain18.A.useB.stayC.keepD.last19.A.raiseB.riseC.runD.grow20.A.forceB.helpC.educateD.show

ADABC BDACD ABBCC DBDBC解析文章讨论了人类与环境保护的问题。1.名词辨析。A资源；B来源；C材料；D物质；根据句意可知是指自然资源。2.上下文串联。根据上下文可知是指现在的情况不一样了。3.上下文串联。第一段说以前的人少，现在情况不一样了，就是指现在的人多了。4.词义辨析。A生产；B用完；C减少；D生产。这里指我们正在用完我们的自然资源。5.动词搭配。A保护；B挽救；C污染；D战斗；根据上下文可知是指我们正在污染环境。6.上下文串联。这里是指如果我们继续这样，人类就将无法幸存。7.动词辨析。解析同上。8.上下文串联。根据下文的modern fishing可知这里谈论的是捕鱼。9.名词辨析。这里是指因为现代捕鱼技术，越来越多的鱼被捕了。10.上下文串联。上文提及砍树，那么应该是指森林将消失。11.上下文串联。上文提及森林消失，这里是指地球上没有东西可以继续生长。12.词义辨析。人类正在使用机器看倒越来越多的树木。13.词义辨析。A结果是；B然而；C一般说来；D因此；结合上下文可知这里表示转折。14.动词辨析。这里是指没有法律来阻止人类污染环境。15.上下文串联。这里是指如果污染的问题以现在的速度继续，。16.名词辨析。A生产；B环境；C问题。D难题。结合上下文可知是指解决这个难题。17.上下文串联。这里是指多吃蔬菜少吃肉。18.动词辨析。A使用；B保持，住在；C保持；D持续；这里是指我们的资源将会更持久。19.上下文串联。这里是指如果人类控制生育，那么污染就不会如此迅速增加。20.动词辨析。A强迫；B帮助；C教育；D展示；根据句意可知是指教育是解决环境问题的好方法。

我明天再问问老师，叫他解释下这个问题