1.One way to preserve species ______ the threat of extinction is to remove them to zoos and parks.
[解析]考点是固定搭配under the threat of 在….的威胁下。
2.Although she didn't mention any names, everyone knew who she was ______ to.
[解析]词组refer to 指的是…. ;mean to 企图 ;regard 认为; investigation 调查
3.I was surprised to find that the computer could ______ a vast number of different tasks. A.perform
[解析]perform做，完成，屡行perform tasks 完成任务; create 创造;display 显示，展示; explain解释。
4.The computer has brought about surprising technological changes ______ we organize and produce information.
A.in a way
B.in the way
C.in that way
D.in no way
[解析]in the way 在….方面;in a way 从某种意义上说，在某种程度上;in that way 以那种方式;in no way决不， 一点也不。.
5.The French pianist who had been praised very highly ______ to be a great disappointment.
[解析]turn out 结果证明是，结果是。 turn up 出现;turn in 上交;出卖;turn down 拒绝。这句话的意思是：那个曾经受到很高评价的法国钢琴家结果却令人大失所望。
6.It was difficult to guess what her ______ to the news would be. A.impression
[解析]本题是词汇辨析题，reaction反应(后接介词to ,意思是“对….的反应”，这句话的意思是：难说她对这个消息会有怎样的反应。impression 印象(后接of,about或on , 意义为“对….的印象”;comment 评论(后接介词on , upon 或about);opinion 评价(后接介词of,about或on)
7.______ is known to the world, Mark Twain is a great American writer.
D.It [解析]本题是语法结构题，考点是as引导的定语从句。这句话的意思是：众所周知，马克.吐温是一位伟大的美国作家。As 引导的定语从句经常和such , same 等词连用，或经常用在as is known to us, as is expected , as might be expected , as is often the case 等句型中。
8.Evidence came up ______ specific speech sounds are recognized by babies as young as 6 months old. A.what
[解析]本题是语法结构题，考点是that引导的同位语从句，先行词是evidence。这句话的意思是： 有证据表明，出生仅6个月的婴儿就能辨别一定的语音。同位语从句与先行词是等同关系，先行词多为表示事实、看法、思想、消息等的名词。常见的有：fact, idea, belief, thought, hope, evidence, doubt, news等。.
9.The robots used in nuclear power plants can prevent human personnel from being ______ to radiation.
[解析]本题是词汇辨析题，考点是expose….to使…暴露于…;使….接触….;本题的意思是：在核工厂使用的机器人可以使人不接触辐射。prevent…. from doing sth. 阻止某人不…..; release释放; disclose 泄露，揭露; reveal 揭示
10.______, they began to get down to business.
A.The holidays are over
B.The holidays were over
C.The holidays being over
D.The holidays had been over
American business is based on the profit motive.So make no mistake. The company you work 11 will have some method of measuring employee productivity. Your future there will depend on 12 you rate.
Productivity is relatively easy to measure in some cases.13 a college student, your overall productivity was measured by your grade point average. Hourly workers, 14 assembly line operators,are usually measured by the 15 of items produced in a given amount of time. Measuring the productivity of some service and management personnel is 16 difficult because of the many factors to be considered.
New employees are 17 expected to perform at their maximum potential.A break - in period is allowed, 18 can be several weeks, depending on the job.By the time of your first performance evaluation, you should 19 average productivity. Then you should try to reach your 20.
[解析]You work for是定语从句修饰The company, work for 的意思是为…工作。这句话的意思是：你为之工作的公司会有一些测量员工工作效率的方法。.
[解析]在这个句子中rate 动词，意思是评价、评估的意思。Depend on后面用宾语从句做介词on 的宾语。本句话的意思是：你的未来将取决于你是怎样评价的。
[解析]As a college student作为一个大学生，在这个句子中as做介词。
C.in addition to
D.as well as
[解析]such as 是例如的意思，表示举例说明。except for 的意思是除了，除…之外，in addition to 意思也是除了，除…之外，as well as 表示“也”“以及”.
[解析]quality意思是质量，figure 数字，数;sum总计，合计、总数;whole 整个，整体。这句话的意思是：小时工，比如集中生产线的操作工，他们通常是以单位时间里所生产的产品总数来衡量工作效率。
[解析]which 引导了非限定性定语从句，that 不能引导非限定性定语从句。
[解析]should have reached 是情态动词的完成形式，从上下文看，有一个非常明显的词By the time ,一般句子中有这个词，那么句子的时态经常用完成时。
Bill Gates' childhood friends recognized that he was exceptional. Bill especially liked swimming and other sports.One of his summer camp friends recalled, “He was never a nerd or a goof(傻瓜、笨蛋)or the kind of kid you didn’t want your team.We all knew Bill was smarter than us. Even back then, when he was nine or ten years old, he talked like an adult and could express himself in ways that none of us understood.”
Bill was also well ahead of his classmates in mathematics and science. He needed to go to a school that challenged(向…挑战)him.Lakeside was Seattle's best school and was noted for its rigorous(严厉的)academic demands, a place where “even the dumb kids were smart.”
Lakeside allowed students to pursue their own interests, to whatever extent they wished.The school prided itself on making conditions and facilities available that would enable all its students to reach their full potential. It was the ideal environment for someone like Bill Gates.
In 1968, the school made a decision that would change thirteen-year-old Bill Gates’ life and that of many of others, too.
At Lakeside the students gained access to a computer-a Program Data processor(PDP)-through a teletype machine. Type in a few instructions on the teletype machine and a few seconds later the PDP would type back its response. Bill Gates was immediately hooked and so was his best friend at the time, Kent Evans, and another student, Paul Allen, who was two years older than Bill.
Whenever they had free time, and sometimes when they didn't, they would dash over to the computer room to use the machine.At fourteen, Bill was already writing short programs for the computer to perform. Early games programs such as Tic-Tac-Toe, or Noughts and Crosses, and Lunar Landing were written in what was to become Bill’s second language, BASIC..
One of the reasons Bill was so good at programming is because it is mathematical and logical. During his time at Lakeside, Bill scored a perfect eight hundred on a mathematics test.
21. The first paragraph tells us that little Bill Gates ______.
A.was different from other children
B.had a smarter mind than other children of the same age
C.couldn't be understood by his friends and even his parents
D.was difficult of approach
[解析]此题是细节题。根据文章第一段He was never a nerd or a goof or the kind of kid you didn’t want your team. We all knew Bill was smarter than us. 此句意思是：他从来不是笨蛋或傻瓜，也不是那种你不想与之游玩的人。大家都清楚比尔比我们都聪明。选项A没有说明他确切的不同之处，其它两个选项均不符合原文内容。
22.Bill Gates chose Lakeside to go to NOT because______.
A.it had excellent education in Seattle
B.it had an exceptional concept that was to develop students' potential as much as possible
C.it provided conditions and equipment necessary for students
D.it had decided to admit him
[解析]此题是细节题。根据文章第二、三段我们可以知道Lakeside湖滨学校以它严厉的学术要求而著称，另外还允许学生发展自己的兴趣，最大限度地挖掘学生的潜力。Bill was also well ahead of his classmates in mathematics and science.He needed to go to a school that challenged(向…挑战)him. 此句意思是：比尔在数学方面也领先于其他同学，他需要上一所具有挑战性的学校。从该句我们可判断D不对，正是他的优秀,学校才决定录取他。
23. It can be inferred from the passage that ______.
A.Lakeside was a milestone in the course of Bill Gates' success
B.Bill pursued his interest in mathematics at Lakeside
C.Bill began to do programming like some early games known
D.Bill's success is due to his mathematical and logical mind
[解析]从inferred一词得知此题是推理题，该题型首先排除文章原文字面提到的内容。我们可根据全文推理出湖滨学校在比尔·盖茨的成功过程中是一个里程碑(举足轻重)，另外In 1968, the school made a decision that would change thirteen-year-old Bill Gates’life and that of many of others, too.也可说明正是湖滨学校的这一决定改变了十三岁的比尔·盖茨的生活，故应选A。.
24.The word “hooked” most probably refers to ______.
B.caught by a curved thing
C.having a great liking for
[解析]此题是语义题。主要测试考生通过上下文理解词语的综合判断能力，备选答案中三个干扰项从不同角度对该词进行似是而非的改写。hook作为名词表示“(钓)钩”,作动词表“用钩钩住”，从下文Whenever they had free time, and sometimes when they didn’t, they would dash over to the computer room to use the machine可猜出hooked指的是“着迷的”。故C对。
25. The passage is mainly discussing ____.
A.Bill Gates' boyhood
D.Bill Gates and Lakeside.
From the earliest times there are records of dolphins(海豚) helping and caring for men. Although they can even kill sharks, they have never been known to attack a human being,rather they have helped men in difficulty on the sea. Dolphins' brains are 30 percent larger than those of people, and are equally complex. During experiments dolphins have learnt to perform tasks that require logical reasoning, so their intelligence is unquestionable.Furthermore, fossil evidence reveals that they have had their larger brains for thirty million years, compared to around a million years for man.
The dolphin ancestors lived upon the land, and dolphins are mammals(哺乳动物) like us, they feed their babies on milk, and breathe air like us. They appear to care for each other, for example if a dolphin is ill, its companions will help it up to the air so that it can breathe. The sounds they make also appear to be some kind of communication.
It seems that we have discovered an animal that may be close to us in intelligence, and furthermore one that is friendly, co-operative,and which has emotions similar to our own. How do we treat these animals? So far man has killed six million dolphins, and every year tens of thousands more are killed.
26. Which of the following statements best expresses the main idea of the passage?
A.Dolphins are human beings' best friends.
B.Dolphins have larger brains than that of human beings.
C.Dolphins are as clever as human beings.
D.Dolphins are quite close to human beings in many ways.