In the past, man did not have to think about the protection of his environment. There were

In the past, man did not have to think about the protection of his environment. There were few people on the earth, and natural resources seemed to be 36 .
Today things are 37 , the world has become too 38 . We are using up our natural resources too quickly, and at the same time we are 39 our environment with dangerous chemicals. If we continue to do this, human life on the earth 40 survive.
Everyone 41 today that if too many fish are taken from the sea, there will soon be none left. Yet, with modern fishing 42 , more and more fish are caught. We know that if too many trees are cut down, 43 will disappear and nothing will grow on the land. Yet, we 44 to use bigger and more powerful machines to 45 more and more trees.
We realize that if rivers are polluted with waste products from factories, we will die. 46 , in most countries wastes are 47 put into rivers or into the sea, and there are _48 laws to stop this.
We know, too, that if the 49 of the world continues to rise at the present rate, in a few years, there will not be enough 50 . What can we do to solve these problems ?
It we eat more vegetables and less 51 , there will be more food available for everyone. Land that is used to grow crops 52 five times more people than land where animals are kept.
Our natural resources will _53 longer if we learn to recycle them. The world population will not rise so quickly if people use modern methods of birth 54 .
Finally, if we educate people to think about the problems, we shall have a better and clearer 55 in the future.
【小题1】A．beautifulB．unlimited （无限的）C．rareD．valuable【小题2】A．commonB．the sameC．changeableD．different【小题3】A．crowdedB．smallC．dirtyD．busy【小题4】A．protectingB．savingC．pollutingD．fighting【小题5】A．may notB．will notC．shall notD．could not【小题6】A．wondersB．realizesC．considerD．discovers【小题7】A．polesB．boatsC．methodsD．ideas【小题8】A mountains B. the sea C. trees D. forests
【小题9】A．continueB．haveC．oughtD．will go on【小题10】A．growB．plantC．saveD．cut down【小题11】A．ThusB．HoweverC．Generally speakingD．Therefore【小题12】A．stillB．evenC．alsoD．certainly【小题13】A．too manyB．a fewC．someD．few【小题14】A．productionB．pollutionC．populationD．revolution【小题15】A．housesB．vegetablesC．foodD．lives【小题16】A．fruitB．meatC．fishD．grain【小题17】A．feedsB．increasesC．suppliesD．helps【小题18】A．useB．stayC．keepD．last【小题19】A．controlB．bornC．planD．reward【小题20】A．natureB．seaC．planetD．forestB

(答案→)B 解析：本文主要从人口增多谈论环境问题。今天人口的不断增长使得地球越来越拥挤，食物缺乏，同时也带来了诸如森林消失、鱼类灭绝等问题，并提醒人们说如果继续下去势必会危及人们的生命。后面通过几个 if 提出了几种改变目前环境现状的建议。【小题1】B。由上句的“过去人们不必去想环境保护问题”及与下文的对比可知，此处说的是人们在过去的一种倾向——“地球上人少，自然资源似乎是无限的”。unlimited 意为“无限的，无穷尽的”。【小题2】D。与上面说的“自然资源似乎是无限的”的倾向不同，“现在情况不同了，人口已越来越多”。【小题3】A。由上文的人口增多联想到“世界变得很拥挤”。【小题4】C。前面有“我们很快就会用尽自然资源”，顺此话意可推测后句应为“同时我们正在用有毒的化学物质污染着我们的环境”。【小题5】B。针对上面出现的情况而作出的一种假设：如果继续这样做，人类生活将会在地球不复存在。continue to do this 在这里是接着上文提到的“我们正在用有毒的化学物质污染着我们的环境”来说的。【小题6】B。从下文的…there will be none left 及…more and more fish are caught 可看出，此处说的是“……如果太多的鱼从海里捕捞上来，不久将不会再剩下鱼了”。take 在这里指“打/捕捞(鱼)”。【小题7】C。句意为：使用现代的捕鱼方法，越来越多的鱼被捕捞到。若选 D，fishing poles 意为“钓鱼杆”，在此不符合上下文。【小题8】D。前面说过分捕鱼会导致鱼类消失，与此相似，如果过分砍伐树木将会导致森林的消失。cut down 意为“砍伐”，其他选项不符合语境。【小题9】A。前面说的是我们知道的砍伐树木的事实及后果，而这里用 Yet道出现在人们不顾这些事实及后果，继续使用大型有力的机器砍伐树木的事实。【小题10】D。从下文…in most countries wastes are 12 put into rivers or into the sea 等来看，此处说的是“我们意识到如果河水被从工厂排出的废物污染的话，我们将会死亡”。【小题11】B。前面说“我们意识到如果从工厂排出的废物污染了河水的话，我们将会死亡”，这与下文的“在多数国家废物仍排放到河流或大海中”构成转折关系，故用 however(然而)。【小题12】 A。尽管人们已意识到污染这个问题，但人们仍然往大海里扔垃圾。【小题13】 D。上面说“人们仍向大海里倒垃圾”，此处说是产生这种现象的因素，即“很少有法律阻止人们这样做”。【小题14】C。此处说的是对人口继续增长的后果，即如果世界人口继续以现在的速度增长，将没有足够的食物吃了。【小题15】C。从…if that the population of the world continues to 14 at the present rate 等可推测，此处说的是“食物”问题。即“几年后将不会有足够的吃的(东西)”，另外，从下一段的内容也可得到提示。【小题16】 B。从下句可知，“如果我们多吃蔬菜，少吃肉，将会给大家提供更多的粮食”。这也可从 vegetables 上得到启发，此处说的是吃的，故用 meat。【小题17】A。从上下文及后面的…if we learn to recycle them 来看，此处说的是“我们的自然资源将持续更长的时间”。last 表示“持续，延续”。【小题18】D动词辨析。A使用B保持，逗留C维持D持续。“我们的自然资源将持续更长的时间”。last 表示“持续，延续”。【小题19】A。如果人们利用现代方法来进行计划生育的话，世界人口就不会提高那么快。birth control 指“计划生育”。【小题20】 C。针对上面的问题，最后提出一点建议或思考：如果我们教育人们来思考这个问题的话，我们将会有一个更好的世界。think about 为“思考，考虑”。

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