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---------------------20 A.doubleB.doubling C.doubledD.doubles 参考答案： B 此句中，doubling为动词的现在分词形式，用作形容词，修饰time。----------------------------------------1What did the author mainly talk about? A.The population problem in the worldB.The population condition in the western world.C.The population problem in Europe.D.The population problem in the U.S 参考答案： D 文章开篇就提出了问题：全世界什么地方人口问题最为严峻？然后作者陈述了自己的观点，在他看来，美国是人口问题最严重的国家，因为在全国范围内出生率与高于死亡率，并且近几十年来大量移民涌入美国。后文通篇都在论述作者的这一观点，因此选D项。----------------------------------------2According to the author， which place should solve the population proplem? A.The USB.EuropeC.Underdeveloped countriesD.The Third World 参考答案： A 仔细阅读文章第四、第五段，就能理解题意，找出正确答案。----------------------------------------3What did the Congressman think about the population problem? A.He thought that the problem was worst in AmericaB.He thought that the problem caused many other problems in the worldC.He thought that the problem cannot be solved easilyD.He thought that the problem in the Third World was to be blamed 参考答案： D 文章中的第六段和第七段都在讲大多数人在提到人口问题是都将其归究于发展中和不发达的第三世界国家，就如同一位有代表性的国会议员讲的话那样，第三世界国家的人口问题导致了水资源的过度消耗，饥荒，灾难等等问题。因此D项为正确选项。----------------------------------------4Why are the negative effects of population growth in the U.S. felt throughout the entire world? A.Because people around the world are all concerned about it.B.Because per capita consumption of resources in America is enormousC.Because the U.S. is the most powerful country in the worldD.Because the U.S .has great influence on other countries 参考答案： B 此题是细节题，根据文中第六段所体现的相关信息，就不难作出正确判断了。----------------------------------------5Which is one of the reasons for the Americans to pay attention to their p
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