英语专业八级改错练习题及答案解析(四十二)

文章作者 100test 发表时间 2008:03:31 12:10:11
来源 100Test.Com百考试题网

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 near-extinctions－such as the blue whales, tiger, panda, and __4__
North American bison—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。