题目
The World Needs Zoos-|||-ZOOS play an important role in the world for conservation and educatio They are particularly important for-|||-endangered species. Many animals are critically endangered and may go extinct in the wild,but in zoos,they are-|||-going strong.Many others are already extinct in the wild and only survive thanks to populations kept in captivity-|||-圈养)Even those critical of zoos often recognize that it is better to have species preserved somewhere than lose-|||-them altogether. 62 -|||-Take the ring tailed lemur(环尾狐猴)of Madagascar for example This animal is almost ubiquitous in zoos as-|||-they breed well in captivity and the public are fond of them.However,despite their high numbers in collections-|||-around the world,they are the most threatened mammalian group on the planet.A recent survey suggests that up to-|||-95 percent of the wild populations have been lost since 2000. 63 One bad year or a new disease could-|||-wipe out those that are left.-|||-Such trends are not isolated.The giraffe is another very common species in zoos. Unlike the lemurs,giraffes-|||-are widespread in the countries across much of sub Saharan Africa.Yet giraffe populations have gone down by a-|||-third in the last thirty years.While less dramatic than the drop in lemur numbers,this is obviously a major loss and-|||-again,whole populations (which some scientists think are of unique subspecies) are on the verge of extinction-|||- 64 Ongoing and future issues from climate change can have unexpected effects on wildlife.It will-|||-become more difficult for conservationists to predict which species might be at risk.As it is,experts are struggling-|||-to continue monitoring the species that are already known to be vulnerable,so it is easy to see why common species-|||-might be overlooked.People might not take a great local loss seriously on the assumption that these animals are-|||-heavily populated elsewhe-|||-There will,I suspect,always be resistance to the argument for keeping animals in captivity and I will not-|||-defend the zoos that are bad and in desperate need of improvement or closure. 65 If even common species-|||-can lose a huge percentage of their populations in a few years,it may be too late to save them with even the best-|||-breeding programs or conservation efforts in the wild.-|||-A.So we can see many endangered animals living in zoos.-|||-B.This is a trend that is only likely to continue.-|||-C.This means that the remaining individuals are at serious risk.-|||-D.In fact,species that are common can also come under serious threat before people realize it.-|||-E.But unfortunately that is not always the case.-|||-F.But if v we wish to keep any real measure of biodiversity on the planet,we may have to lean on zoos far more

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答案

解析
本题考查对文章内容的理解以及上下文逻辑关系的把握。解题的关键在于分析每个段落的主旨,根据前后文的语义和逻辑来选择合适的句子填入相应的空格。
62题
前文提到动物园在保护濒危物种方面很重要,很多濒危动物在野外可能灭绝但在动物园里状况良好。后文以环尾狐猴为例,指出尽管它们在动物园数量众多,但在野外却是最受威胁的哺乳动物群体。这说明常见的物种也可能面临严重威胁。
- 选项分析:
- A选项“所以我们可以看到很多濒危动物生活在动物园里”,与后文强调常见物种面临威胁的内容不衔接。
- B选项“这种趋势可能只会继续下去”,没有引出常见物种面临威胁的话题。
- C选项“这意味着剩下的个体面临严重风险”,没有体现出常见物种这一关键信息。
- D选项“事实上,在人们意识到之前,常见的物种也可能面临严重威胁”,能够很好地衔接前后文,引出后文环尾狐猴的例子。
- E选项“但不幸的是,情况并非总是如此”,没有明确指出与常见物种面临威胁的关系。
- F选项“但如果我们希望在地球上保持真正的生物多样性,我们可能不得不比许多人意识到的更依赖动物园”,与后文内容不相关。
63题
前文提到环尾狐猴野外种群自2000年以来减少了高达95%,后文说糟糕的一年或一种新疾病就可能消灭剩下的环尾狐猴。这表明剩下的环尾狐猴面临着严重的风险。
- 选项分析:
- A选项“所以我们可以看到很多濒危动物生活在动物园里”,与前后文强调的环尾狐猴野外种群面临风险的内容不相关。
- B选项“这种趋势可能只会继续下去”,没有直接体现出剩下个体面临严重风险的意思。
- C选项“这意味着剩下的个体面临严重风险”,能够准确地衔接前后文,说明环尾狐猴野外种群减少后剩下个体的危险处境。
- D选项“事实上,在人们意识到之前,常见的物种也可能面临严重威胁”,没有针对环尾狐猴剩下个体的情况进行说明。
- E选项“但不幸的是,情况并非总是如此”,没有明确指出与环尾狐猴剩下个体面临风险的关系。
- F选项“但如果我们希望在地球上保持真正的生物多样性,我们可能不得不比许多人意识到的更依赖动物园”,与前后文内容不相关。
64题
前文提到长颈鹿在动物园很常见,但在过去三十年里数量下降了三分之一,一些种群濒临灭绝。后文指出气候变化等问题会对野生动物产生意想不到的影响,保护主义者更难预测哪些物种可能面临风险。这说明物种数量下降的趋势可能会持续下去。
- 选项分析:
- A选项“所以我们可以看到很多濒危动物生活在动物园里”,与前后文强调的物种数量下降趋势的内容不相关。
- B选项“这种趋势可能只会继续下去”,能够很好地衔接前后文,说明长颈鹿数量下降的趋势以及气候变化等因素可能导致这种趋势持续。
- C选项“这意味着剩下的个体面临严重风险”,没有体现出趋势会继续的意思。
- D选项“事实上,在人们意识到之前,常见的物种也可能面临严重威胁”,没有针对物种数量下降趋势持续的内容进行说明。
- E选项“但不幸的是,情况并非总是如此”,没有明确指出与物种数量下降趋势持续的关系。
- F选项“但如果我们希望在地球上保持真正的生物多样性,我们可能不得不比许多人意识到的更依赖动物园”,与前后文内容不相关。
65题
前文提到人们可能会忽视常见物种的减少,因为认为它们在其他地方数量众多。后文说即使是常见物种在几年内大量减少,可能也来不及拯救。这说明为了保护生物多样性,可能需要更依赖动物园。
- 选项分析:
- A选项“所以我们可以看到很多濒危动物生活在动物园里”,与前后文强调的为了保护生物多样性需要依赖动物园的内容不相关。
- B选项“这种趋势可能只会继续下去”,没有体现出需要依赖动物园的意思。
- C选项“这意味着剩下的个体面临严重风险”,没有针对需要依赖动物园的内容进行说明。
- D选项“事实上,在人们意识到之前,常见的物种也可能面临严重威胁”,没有引出需要依赖动物园的结论。
- E选项“但不幸的是,情况并非总是如此”,没有明确指出与需要依赖动物园的关系。
- F选项“但如果我们希望在地球上保持真正的生物多样性,我们可能不得不比许多人意识到的更依赖动物园”,能够很好地衔接前后文,说明为了保护生物多样性需要更依赖动物园。