考博英语改错模拟练习题及答案解析（93）
考博英语考试中有些院校的考博题型中有改错这项，考博英语改错题型需要同学们运用语法、修辞、结构等知识识别短文内的语病并作出改正，很考验考生的语法能力，新东方在线考博频道整理了考博英语改错模拟练习题及答案解析系列文章供考生们参考练习。
Dinosaurs, saber-tooth tigers and the dodo bird are famous examples __1__of animals that have become extinct. In case of the dinosaurs, it __2__
seems likely that a catastrophic event alters the global climate __3__
enough to lead to their disappearance. More recent extinctions and nearextinctions-such as the blue whales, tiger, panda, and __4__North Americanbison—have been the direct result of human activity.By the early 1990s, species were becoming extinct at a rate of three per hour, or 27,000 every day – a figure quoted by the American biologist Edward O.Wilson of Harvard University, based on his most conservative estimates. This rate of extinctions carries with it some terrible consequences. Each plant that becomes extinct,for example, may take with it as much as 30 insects and animals __5__that depend on it for food. Habitat loss is one of the most important causes of extinction. For rising populations in many countries __6__lead to the clearing of more land, habitats such as raining forest __7__and grasslands disappear.
In the East Africa, once renowned for its wildlife, few wild animals __8__
remain living outside the boundaries of national parks and game __9__reserves. In other parts of the world, coastal ecosystems are clearing __10__for development. Wetland areas are drying out as a result of water extraction to support farming and tourism. Bird species are among the worst affected by the loss of wetlands.
答案及解析:
1.saber-tooth—saber-toothed
如果是“形容词+名词”作前置修饰语，那么名词要加-ed。
2.^case—the
in case of 和 in the case of 的意思是不同的，前者的意思是“万一”，后者的意思是“在……的情况中”
3.alters—altered
这里谈的是恐龙灭绝的时期，所以时间是过去。
4.whales—whale
定冠词+可数名词的复数 是特指，所以the blue whales是特指，但是上下文并没有提及特定的蓝鲸，所以从整个句子的意思来看，这里是指物种，是类指，所以应该用“定冠词+可数名词单数”形式。
5.much—many
insects and animals 是可数名词，所以应该说as many as
6.For-- As/Since
尽管for作为连词可以引导原因状语分句，但是它一般不放在句首。
7.raining—rain
rain forest,指热带雨林
8.the去掉
East Africa是专有名词。
9.living—alive
remain是系动词，后面的形容词是主语补足语，living不能作主语补足语。
10.clearing—cleared
这里需要用被动语态。