大学英语六级改革适用（阅读）模拟试卷700
词汇理解
The now extinct passenger pigeon has the dubious honor of being the last species anyone ever expected to disappear. At one point, there were more passenger pigeons than any other species of bird. Rough【C1】________of their population went as high as five billion and they accounted for around 40 percent of the total indigenous bird population of North America in the early 19th century.
Despite their huge population, passenger pigeons were【C2】________to human intrusion into their nesting territory. Their nests were shabby things and two weeks after the eggs【C3】________, the parent pigeons would abandon their offspring, leaving them to take care of themselves. People discovered that these baby pigeons were really tasty, and the adult birds were also quite 【C4】________. First the Native Americans and then the transplanted Europeans came to consider the birds a great【C5】________.
By the 1850s, commercial trapping of passenger pigeons was proceeding at an【C6】________pace. Hundreds of thousands of the birds were being harvested every day to be made into popular pigeon pies. In addition, large【C7】________of the pigeons\’ nesting territory were being cleared away for planting crops and creating pasture land. As numerous as the passenger pigeons were, they were not an【C8】________resource. By the 1880s, it was noticed that the bird population had become seriously【C9】________. The last passenger pigeons killed in the wild were shot in 1899.
Eventually those billions and billions of birds shrank to a single remaining【C10】________, a passenger pigeon named Martha, who died on September 1, 1914, in captivity at the Cincinnati Zoo. In addition to being the end of an era, it was also the first time humans were able to exactly time the extinction of a species.
A) vulnerable F) refuge K) excerpts
B) unprecedented G) plazas L) estimates
C) tracts H) infinite M) edible
D) specimen I) hatched N) depleted
E) robust J) expired O) delicacy
1.【C1】
L
解析：空格前为形容词Rough，空格后为介词of，因此空格处应填入名词(n.)。结合上文“候鸽的数量一度比其他任何鸟类都要多”，空格处所在句提到了某一具体时间和鸟类的数量，可见这应该是一种粗略估计。名词中只有L项estimates“估计”符合句意。故本题选L。
2.【C2】
A
解析：空格前有主语passenger pigeons和系动词were，空格后为介词to，因此空格处应填入形容词(a.)、动词的分词形武(v.-ing／v.-ed)作表语。根据句意“尽管候鸽数量庞大，但它们的筑巢之地________遭到人类入侵”，Despite提示后半句与前半句语义形成转折，可推知，本句应意为“候鸽的筑巢之地容易被入侵”，这与其数量庞大的地位不符。只有A项vulnerable“易受伤的，易受攻击的”可构成固定搭配be vulnerable to，意为“易受……的伤害”，符合句意。故本题选A。
3.【C3】
I
解析：分析句子结构，该句是一个由and连接的并列句。在第二个并列句中，the parent pigeons would abandon their offspring为句子主干，leaving…为伴随状语，前面的two weeks after…为时间状语从句，其主语为the eggs，因此空格处应填入动词(v.)作谓语。根据空格后母鸽的做法，空格后的动词应与“孵化”表意相近。动词中只有I项hatched“孵化”符合句意。故本题选I。
4.【C4】
M
解析：空格前为系动词were和副词quite，空格后为句号，因此空格处应填入形容词(a.)、动词的现在分词(v.-ing)或过去分词(v.-ed)作表语。由句意“人们发现这些乳鸽真的很好吃，成年的鸽子也很________”可知，and前后为并列句，因此后半句和前半句语义相似，且空格前有副词also，空格后的词应与“好吃的，美味的”表意相近。只有M项edible“可食用的”符合句意，quite edible意为“很好吃”。故本题选M。
5.【C5】
O
解析：空格前为不定冠词a和形容词great，因此空格处应填入名词(n.)。结合句意“首先是美洲原住民，然后是移民过来的欧洲人，开始把这种鸟视为________”，上句讲述这种鸟很好吃，因此本句应进一步阐述美味的表现，空格处的名词应与“好吃，美味”表意相近。名词中只有O项delicacy“美味佳肴”符合句意。故本题选O。
6.【C6】
B
解析：空格前为不定冠词an，空格后为名词pace，因此空格处应填入形容词(a.)修饰名词。本句意为“到19世纪50年代，商业诱捕候鸽以________速度进行”。结合下文推断，空格处应表示商业诱捕候鸽的速度非常地快，所填
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