单选题

Few creatures on earth are as cute as the black lion tamarin, and few have as dramatic a story line. Pug-nosed and diminutive, with a comic fringe of hair, these monkeys dwell in trees in small tracts of forest in southeastern Brazil. Or they did until 1905, when they were declared extinct. No one saw a black lion tamarin again in the wild until 1970. Later, in the 1990s, some Brazilian researchers turned up a small set of isolated, inbred populations scattered over a wide region. Since that time, they have been engineering tamarin migration, doing everything they can to save the world's most distinctive primates.
Although they are no larger than house cats, tamarins have brains big for their size and a family life organized like our own. They live in groups anchored by an adult male andadult female, along with their offspring. When a mother bears young, she usually produces twins, and although members of the group share in their upbringing, it is most often the father who carries them around in the trees, where the families feed on fruits, insects and bird's eggs.
Unhappily for the lion tamarins, their tree-bound niche began to disappear after the Portuguese landed in Brazil and began clearing forest to make room for Rio de Janeiro, the settlements and farms. As is the case for so many threatened species, the breakup of their habitat sounded the death knell for tamarins, depriving them of the continuity of forest they require to remain abundant and safe from potential threats in any single vicinity. The animals avoid predators by hardly ever coming down from the trees, so even a narrow logging road through a forest can begin the breakup by preventing them from moving from one patch of forest to another.
A simple solution was to build bridges across roads, allowing the monkeys to move from one forest to another. With some lumber and the researchers' work, habitats that had been separated became continuous again, improving opportunities for migrating and mating.
The next step was to broaden the distribution of the population. The researchers captured two families of black lion tamarins and moved them to a new forest. After a year, the moves were declared a success: Not only had 80 percent of the tamarins survived, but they had also produced new offspring. So far, so good. The researchers had learned the animals could adjust to the new habitats, even if the insects there tasted a little different or the trees were a slightly different size.
The techniques for saving species in the wild vary. Species with less stringent habitat requirements, like wild turkeys, have been rescued by moving them into new settings as well as outlawing their killing. More challenging to preserve are species that require a lot of land, like elephants, and species that have highly specific requirements for habitat and prey -- like black-footed ferrets. Ultimately, as in all challenges, knowledge is power to save wild species from extinction.

单选题 A tamarin can be called any of the following EXCEPT ______.

单选题 According to Paragraph 1, the tamarin story can be retold chronologically as follows: Ⅰ. Tamarins were declared extinct. Ⅱ. No one saw a tamarin in the wild. Ⅲ. Tamarins used to live in forests in southern Brazil. Ⅳ. The researchers have been doing everything they can to save tamarins. Ⅴ. Some researchers found by chance a small set of tamarins.

【正确答案】 B

【答案解析】[分析] 细节题型 Chronologically 表示：按年代顺序排列地。Ⅰ．的内容在第四行中提及，发生在1905年一 1905年宣称tamarin(绢毛猴)已灭绝；Ⅱ．的内容在第五行中提及，发生在1970年，直到1970年没有人见过黑脸狮狨猴；Ⅲ．的内容在第三行中提及，发生在1905年前，这些猴栖息在巴西东南部森林间的空旷地域的树上；Ⅳ．的内容在第六行中提及，发生在二十世纪九十年代，从那时起巴西的一些研究人员就一直在尽他们所能来挽救世界上最与众不同的灵长类，设计绢毛猴的移民；Ⅴ．的内容在第五行中提及，发生在二十世纪九十年代一巴西的一些研究人员发现了一小群与世隔离的天生绢毛猴分散在广阔的地域；因此按时间顺序分，它们应是Ⅲ—Ⅰ—Ⅱ—Ⅴ—Ⅳ；答案为B。

单选题 Which of the following is NOT characteristic of a tamarin family?

单选题 Tamarins lost the paradise of their tree-bound niche mainly because the Portuguese ______.

单选题 The breakup of the habitats resulted in the following EXCEPT ______.

【正确答案】 D

【答案解析】[分析] 是非题型见第三段第二句：As is the case for so many threatened species, the breakup of their habitat sounded the death knell for tamarins，depriving them of the continuity of forest they require to remain abundant and safe from potential threats in any single vicinity. (正如许许多多濒危物种一样，绢毛猴们赖以生存的生活环境的崩溃为他们敲响了丧钟，任何一块聚居地的潜在威胁也剥夺了他们保持大量种群和安全所需的连片的森林)；因此选项A，B，C中提到的食物短缺、潜在威胁的逼近及原本为逃避那些食肉动物在树上生活所需的连片森林都是原因，因此D为答案。