一、单项选择题。
1.第1部分：词汇选项
He expressed concern that the ship might be in distress.
A. despair
B. difficulties
C. need
D. danger版权所有www.for68.com
2.It's all advisable idea to get out of the dispute.
A. wise
B. urgent
C. useless
D. proper
3.There was no alternative but to close the road.
A. way
B. means
C. choice
D. reason
4.He seems bizarre these days.
A. unusual
B. absent-minded
C. crazy
D. lunatic
5.We're happy to collaborate with you in the project.
A. compete
B. cooperate
C. coordinate
D. contend
6.This text is too difficult to comprehend.
A. understand
B. digest
C. summarize
D. read
7.The room is small but cozy.
A. cold
B. splendid
C. comfortable
D. gorgeous
8.The leader's corruption undermined the image of the company.
A. establish
B. damage
C. strengthen
D. consolidate
9.The novel depicts the history of the nation.
A. narrates
B. illustrates
C. describes
D. exemplify
10.Civil rights are embodied in the platform.
A. included
B. excluded
C. expressed
D. emerged
11.She likes to visit exotic islands.
A. distant
B. interesting
C. remote
D. backwards
12.The food we have is inadequate.
A. too much
B. too many
C. not enough
D. not short
13.Many people in the region have died from the epidemic disease.
A. infectious
B. inferior
C. infinite
D. inevitable
14.She is incapable of doing the demanding job.
A. qualified of
B. incompetent with
C. good at
D. ignorant of
15.It's just a petty mistake.
A. major
B. important
C. serious
D. minor
二、综合题。版权所有www.for68.com
1.第2部分：阅读判断
Resources Crisis
If the population of the earth goes on increasing at its present rate, there will eventually not be enough resources left to sustain life on the planet. By the middle of the 21st century, if present trends continue, we will have used up all the oil that drives our cars, for example. Even if scientists develop new ways of feeding the human race, the crowded conditions on earth will make it necessary for us to look for open space somewhere else. But none of the other planets in our solar system are capable of supporting life at present. One possible solution to the problem, however, has recently been suggested by an American scientist, Professor Carl Sagan.
Sagan believes that before the earth's resources are completely exhausted it will be possible to change the atmosphere of Venus and to create a new world almost as large as earth itself. The difficulty is that Venus is much hotter than the earth and there is only a tiny amount of water there.
Sagan proposes that algae （藻类） organisms that can live in extremely hot or cold atmospheres and at the same time produce oxygen, should be bred in conditions similar to those on Venus. As soon as this has been done, the algae will be placed in small rockets. Spaceships will then fly to Venus and fire the rockets into the atmosphere. In a fairly short time, the algae will break down the carbon dioxide into oxygen and carbon.
When the algae have done their work, the atmosphere will become cooler, but before man can set foot on Venus it will be necessary for the oxygen to produce rain. The surface of the planet will still be too hot for men to land on it but the rain will eventually fall and in a few years something like earth will be reproduced on Venus.
16. In the long run, the most insoluble （不能解决的） problem caused by population growth on earth will probably be the lack of space.
A. Right B. Wrong C. Not mentioned
17. On Venus there is a lot of oxygen and water.
A. Right B. Wrong C. Not mentioned
18. The population on the earth continues to increase.
A. Right B. Wrong C. Not mentioned
19. Scientists are planting algae on Venus to create a new world for human beings.
A. Right B. Wrong C. Not mentioned
20. Man can land on Venus only when it rains there.
A. Right B. Wrong C. Not mentioned
21. Living on Venus can be realized in the 21st century.
A. Right B. Wrong C. Not mentioned
22. Algae are plants that can produce oxygen.
A. Right B. Wrong C. Not mentioned
2.第3部分：概括大意与完成句子版权所有www.for68.com
Population
1. The world's population continues to grow. There now are about 5 billion of us on earth. The figure could reach 6 billion by the end of the century and 11 billion in another 75 years. Experts have long been concerned about such a growth. Where will we find the food, water, jobs, houses, schools and health care for all these people?
2. A major new study shows that the situation may be changing. A large and rapid drop in the world's birth rate has taken place during the past 10 years. Families generally are smaller now than they were a few years ago. It is happening in both developing and industrial nations.
3. Researchers said they found a number of reasons for this. More men and women are waiting longer to get married and are using birth control devices and methods to prevent or delay pregnancy①. More women are going to school or working at jobs away from home instead of having children. And more governments, especially in developing nations, now support family planning programs to reduce population growth.
4. China is one of the nations that have made great progress in reducing its population growth. China has already cut its rate of population growth by about one half since 1970.
5. Each Chinese family is now urged to have no more than one child. And the hope is to reach a zero population growth with the total number of births equaling the total number of deaths, by the year 2000.
6. Several nations in Europe already have fewer births than deaths. Experts said that these nations could face a serious shortage of workers in the future. And the persons who are working could face much higher taxes to help support the growing number of retired people.
Notes：
①pregnancy n. 怀孕
23. Paragraph 1. ________.
24. Paragraph 3. ________.
25. Paragraph 4. ________.
25. Paragraph 6. ________.
A. The situation in China
B. Fewer population in Europe
C. Growing population in the world
D. New situation
E. Reasons for lower birth rate
F. Family planning program
27. In the future, Europeans will have to pay ________.
28. Drop in birth rate is happening ________.
29. Now men and women get married ________.
30. Families generally are ________ than before.
A. larger
B. smaller
C. higher taxes
D. around the world
E. at a much later time
F. lower taxes
3.第4部分：阅读理解版权所有www.for68.com
Human Wants
Human wants seem endless. When a starving man gets a meal, he begins to think about an overcoat; when an executive gets a new sports car, visions of country clubs and pleasure beats dance into view.
The many wants of mankind might be regarded as making up several levels. When there is money enough to satisfy one level of wants, another level appears. The first and most basic level of wants involves food. Once this want is satisfied, a second level of wants appears clothing and some sort of shelter. By the end of World War II these wants were satisfied for a great majority of Americans. Then a third level appeared. It included such items as automobiles and new houses.
By 1957 or 1958 this third level of wants was fairly well satisfied. Then in the late 1950s a fourth level of wants appeared: the "life-enriching" level. While the other levels involve physical satisfaction－the feeding, comfort, safety, and transportation of the human body－this level stresses mental needs for recognition, achievement, and happiness. It includes a variety of goods and services, many of which could be called "luxury" items. Among them are vacation trips, the best medical and dental① care, and entertainment. Also included here are fancy foods and the latest styles in clothing.
On the fourth level, a greater percentage of consumer spending goes to services, while on the first three levels more is spent on goods. Will consumers raise their sights to a fifth level of wants as their income increases, or will they continue to demand luxuries and personal services on the fourth level?
A fifth level probably would involve wants that can be achieved best by community action. Consumers may be spending more on taxes to pay for government action against disease, ignorance, crime and prejudice. After filling our stomachs, our clothes closets, our garages②, our teeth, and our minds, we now may seek to ensure the health, safety, and leisure to enjoy more fully the good things on the first four levels.
Notes：
①dental a. 牙齿的，牙科的
②garage n. 汽车间，修车厂；车库
31. According to the passage, man will begin to think about such needs as housing and clothing only when _______.
A. he has saved up enough money
B. he has grown dissatisfied with his simple shelter
C. he has satisfied his hunger
D. he has learned to build houses
32. It can be inferred from the passage that by the end of World War II most Americans _______.
A. were very rich
B. lived in poverty
C. had the good things on the first three levels
D. did not own automobiles
33. Which of the following is NOT related to "physical satisfaction"? _______.
A. A successful career.
B. A cozy home.
C. A good service.
D. A family car.
34. What is the main concern of man on the fourth level? _______.
A. The more goods the better.
B. The more mental satisfaction the better.
C. The more "luxury" items the better.
D. The more earnings the better.
35. The author is inclined to think that a fifth level _______.
A. would be little better than the fourth level
B. may be a lot more desirable than the first four
C. can be the last and most satisfying level
D. will become attainable provided the government takes actions
4.第4部分：阅读理解 第二篇版权所有www.for68.com
Merge
Representatives of Callahan Media Associates （CMA） announced today that the news agency would attempt to buy the National Broadcasting System （NBS）, the second largest television and radio network in the United States. Ronald Callahan, son of Jessica Callahan, who started CMA, told reporters that he expected his company's of offering price to be high enough to win out over other offers. He indicated that NBS executives had already discussed reorganization plans that might result from a CMA takeover.
A native of the United Kingdom, Jessica Callahan began to buy newspapers, magazines, and radio stations in the United States eight years ago, and CMA now owns or controls more than fifteen news organizations here. Before she became a leader in media in this country, she had established her family-owned company as one of the most important forces in British TV and newspapers. Callahan started her news career more than twenty-five years ago, and she had worked as a reporter on three different papers when she took the job of editor of England's Birmingham Herald （伯明翰先驱报）, a newspaper that had been experiencing financial difficulties for several years. Her success in raising the news reporting standards as well as making the Herald into a profitable business gained Callahan the attention and respect of the British news establishment. By the time she was 35, she had become a publisher and started CMA, which is now one of the Miami Journal almost eight years ago, but she had been reading the newspaper for several years, and she said that she liked the paper's style. After she had owned the Journal for just over a year, she bought a small radio station in Georgia, and in the next five years she went on to acquire news organizations in several different parts of the country.
If CMA becomes the owner of NBS, for the first time it will have controlled over a nationwide TV network. In all interview last week, Philip Rosen, the president of NBS, said that he was not very happy about the purchase. He agreed that Callahan and CMA had done a lot to help American newspapers become more financially secure, but he expressed fears that the new management was going to make news coverage on NBS irresponsible. He stated that he hoped he could remain with NBS but said that this might not be possible.
36. The writer thinks that CMA's offer to buy the National Broadcasting System is probably ________.
A. the only one
B. a good one
C. unacceptably low
D. of great competition
37. Jessica Callahan captured the confidence of the press after she became the editor of Birmingham Herald because ______.
A. she was experienced
B. she had strong financial background
C. since then it started to make money
D. she enjoyed good popularity
38. Jessica Callahan has never ________.
A. visited the United States
B. owned a national TV network
C. worked as an editor
D. read the Miami Journal
39. The attitude of NBS top executive to the CMA takeover was that ________.
A. he was opposed to the purchase
B. he hoped the takeover would not affect the system's fame
C. he was afraid NBS would suffer serious financial loss
D. he could not leave his present position
40. Which of the following can be the best title for this passage? ________.
A. Jessica Callahan－a Successful Woman
B. CMA－from British to USA
C. CMA Buying NBS?
D. CMA's Attractive offer to NBS
5.第4部分：阅读理解 第三篇版权所有www.for68.com
Oceanography
Oceanography has been defined as "the application of all sciences to the study of the sea".
Before the nineteenth century scientists with an interest in the sea were few and far between. Certainly Newton considered some theoretical aspects of it in his writings but he was reluctant① to go to sea to further his work.
For most people the sea was remote, and with the exception of early intercontinental travelers or others who earned a living from the sea, there was little reason to ask many questions about it, let alone② to ask what lay beneath the surface. The first time that the question "What is at the bottom of the oceans?" had to be answered with any commercial consequence was when the laying of a telegraph cable from Europe to America was proposed. The engineers had to know the depth profile of the route to estimate the length of the cable that had to be manufactured.
It was to Maury of the US Navy that the Atlantic Telegraph Company turned in 1853 for information on this matter. In the 1840s, Maury had been responsible for encouraging voyages during which soundings were taken to investigate the depths of the North Atlantic and Pacific Oceans. Later, some of his findings amused much popular interest in his book The Physical Geography of the Sea.
The cable was laid, but not until 1866 was the connection made permanent and reliable. At the early attempts, the cable failed and when it was taken out for repairs, it was found to be covered in living growths, a fact which defied contemporary scientific opinion that there was no life in the deeper points of the sea.
Within a few years oceanography was under way. In 1872 Thomson led a scientific expedition, which lasted for four years and brought home thousands of samples from the sea. Their classification and analysis occupied scientists for years and led to a five-volume report, the last volume being published in 1895.
Notes：
①reluctant a. 不愿的，勉强的
②let alone 更不用说
41. The passage implies that the telegraph cable was built mainly ______.
A. for oceanography studies
B. for business considerations
C. for military purposes
D. for investigating the depths of the oceans
42. It was ______ that asked Maury for help in oceanography studies.
A. the American Navy
B. some early intercontinental travelers
C. those who earned a living from the sea
D. the company which proposed to lay an undersea cable
43. The aim of voyages Maury encouraged in the 1840s was ______.
A. to make some sound experiments in the oceans
B. to collect samples of sea plants and animals
C. to estimate the length of the cable that was to be made
D. to measure the depths of two oceans
44. "Defied" in the 5th paragraph probably means ______.
A. doubled
B. gave proof
C. to challenged
D. agreed to
45. This passage is mainly about ______.
A. the beginnings of oceanography
B. the laying of the first undersea cable
C. the investigation of ocean depths
D. the early intercontinental communications
6.第5部分：补全短文版权所有www.for68.com
Exploration
Landing men on the moon captured the public imagination like few other events this century. It had less to do with science than with demonstrating superiority during the cold war, but the appeal of the adventure meant that the Russians, who retrieved lunar rock samples far more economically using robots, came off very much second best. No one has been back to the moon since the Apollo astronauts left in 1972, so the mission has retained its glamour （魅力）.
（46） ______. Most spacecraft are unmanned these days but missions are still unpredictable; a spacecraft was destroyed on the approach to Mars only last month.
Our sights are set on Mars because people still hope to find life there－not the movie director's idea of a Martian （火星）, but rather microscopic forms of life hidden beneath the surface to protect them from the cold. Another possible home to life is Jupiters moon, Europe, which seems to have slush （雪泥, 烂泥） beneath its ice crust that is kept warm by tides. （47） ______.
Using our near-space environment is the aim for the foreseeable future, people are even setting up businesses to offer trips in space to rich members of the general public. （48） ______ .It builds on the success of the space shuttle （航天飞机）, which proved very flexible and allowed masses of scientific experiments in micro-gravity; and also on Mars, which told us a lot about the physical effects of long duration space flight. The Russians kept it going much longer than anyone expected－you were almost blase （玩腻了的） about the latest crisis.
Beyond our own solar system, we will keep up the search for planets that might sustain life. （49） ______ .You can say: "There are so many stars, some of them with planets, that some of those planets must be conducive （有利的） to live?" But even if that were true, that life might have happened millions of years ago or be going to happen millions of years in the future. （50） ______ .
A. The real excitement surrounds the international space station, which will be built over the next five or six years by countries working collaboratively （共同的） on a spacecraft for the first time.
B. The prospects aren't great.
C. Spacecrafts may help mankind to realize the dream of living on other planets.
D. Although putting people into orbit is now routine, traveling further is not.
E. We now know that stars other than our sun have planets, but there's still a big difference between finding planets and finding life.
F. But exploration is a long way off.
7.第6部分：完形填空版权所有www.for68.com
Stars
The old belief that the universe never changes is quite （51） ______. Even （52） ______ the invention of the telescope, astronomers noticed that bright stars suddenly appear in the sky and then later （53） ______. These stats were called "novae" because they were thought to be （54） ______. In fact we now know that they are really old stars which are slowly dying.
Novae are old stars which are slowly dying. （55） ______ they do so, they let out huge clouds of material, sometimes as large as the earth, and these explode into space （56） ______ a speed of about 8,000,000 kilometers per hour. When this happens, the hotter parts of the star become （57） ______, and this is why novae are so bright. Although the explosions are huge on a human scale, they only （58） ______ a small part of the dying star's energy. The death is a slow one and the star may continue to explode for thousands of years. Indeed, there are even some stars which explode once （59） ______ two weeks.
There are other old stars which do not die slowly, but are （60） ______ destroyed by one great explosion. These are known （61） ______ "supernovae". The explosion of a supernova is equivalent （62） ______ about a million hydrogen bombs going off at the same time. Just before the explosion the star's density becomes very great and it spins at a very high speed. A matchbox of materials taken from the star at that time would weigh about 1,000 tons, and the star （63） ______ be turning at about 16,000,000 kilometers per hour. The explosion itself occurs （64） ______, in the interval of a minute, but the supernova continues to shine long （65） ______ the event. One supernova which Chinese astronomers observed in 1054 can still be seen by us today. It has been shining for at least nine hundred years.
51. A. right B. reasonable C. sound D. wrong
52. A. after B. before C. during D. for
53. A. disappear B. lost C. missed D. exploded
54. A. old B. evil C. new D. dying
55. A. When B. While C. After D. As
56. A. in B. at C. with D. on
57. A. invisible B. brilliant C. visible D. noticeable
58. A. consume B. cost C. spend D. lose
59. A. every B. each C. at D. within
60. A. partly B. completely C. clearly D. instantly
61. A. for B. be C. as D. with
62. A. with B. to C. against D. by
63. A. will B. should C. would D. must
64. A. suddenly B. shortly C. simultaneously D. quickly
65. A. before B. with C. during D. after
一、单项选择题。
1.
「正确答案」 D
「答案解析」 distress：危险，海难。danger：危险。difficulty：困难。need：需要。despair：绝望，失望。句意为：他对那艘船可能遭遇海难表示出关心。
2.
「正确答案」 A
「答案解析」 advisable：明智的。wise：明智的。proper：正确的。Your spelling is not proper. 你的拼写不对。urgent：紧急的。He has some urgent businesses to do. 他有些紧急的事要做。
3.
「正确答案」 C
「答案解析」 alternative：选择。choice：选择。way：方法，道路。means：方式。reason：原因。句意为：没有其他选择了，只有关闭道路。
4.
「正确答案」 A
「答案解析」 bizarre：奇怪的。unusual：不寻常的。absent-minded：心不在焉的，走神的。He was absent-minded in the class．他上课走神了。crazy：疯狂的。lunatic：疯狂的。
5.
「正确答案」 B
「答案解析」 collaborate：协作，合作。cooperate：合作。compete：竞争。coordinate：协调。She has to coordinate the departments in the company. 她必须协调公司的不同部门。contend：竞争。The runners are contending for championship．赛跑者在为得冠军而竞争。
6.
「正确答案」 A
「答案解析」 comprehend：明白。understand：理解，明白。digest：消化。The food is difficult to digest. 这食物难以消化。summarize：总结。to summarize the passage 总结文章大意。
7.
「正确答案」 C
「答案解析」 cozy：舒适的。comfortable：舒适的。splendid：伟大的，华丽的。gorgeous：美丽的，华丽的。What a splendid idea! 这个主意太妙了！The palace is gorgeous. 这宫殿真美。
8.
「正确答案」 B
「答案解析」 undermine：毁坏。damage：破坏，毁坏。strengthen：加强。consolidate：巩固，加强。
9.
「正确答案」 C
「答案解析」 depict：描绘。describe：描述，描绘。narrate：叙述。He narrated the whole story．他讲述了整个故事。illustrate：用图表举例，画插图。 She has illustrated several children's books．她为好几本儿童书画了插图。exemplify：用例子说明。以…为榜样。I will exemplify my point with a story．我会用一个故事举例说明我的观点。
10.
「正确答案」 A
「答案解析」 embody：包含，体现。include：包括，包含。exclude：排除在外。express：表达。emerge：出现，浮出。After a few weeks, the caterpillar emerges from its cocoon. 几周后，毛毛虫从茧中出来了。
11.
「正确答案」 B
「答案解析」 exotic：有趣的，异域情调的。interesting：有趣的。remote：遥远的。偏远的。a remote village：遥远的小山村。backwards：落后的。The village is backwards. 这个村庄很落后。
12.
「正确答案」 C
「答案解析」 inadequate：不充足的。即not enough不足够的。
13.
「正确答案」 A
「答案解析」 epidemic：传染的。infectious：传染的。inferior：差的，低劣的。This design is inferior to that one. 这个设计比那个设计差。infinite：无限的。Whether the universe is infinite or not is not known. 宇宙是否无限还未可知。inevitable：不可避免的，必然的。War now seems almost inevitable. 战争看来几乎不可避免的。
14.
「正确答案」 B
「答案解析」 be incapable of：没有能力做……。incompetent with：不胜任……。qualified：合格的。good at：善于……。ignorant of：对……无知。
15.
「正确答案」 D
「答案解析」 petty：小的，不重要的。major：主要的，大的。important：重要的。serious：严肃的。minor：小的，不重要的。
二、综合题。版权所有www.for68.com
1.
「正确答案」 16-22 ABABACB
「答案解析」
16. 答案：A
解析：句意“从长远看，人口增长所引起的最无法解决的问题是空间的狭小”，文章第1段中提到了即使有足够的食物来养活人类，拥挤的状况仍需要找新的空间。
17. 答案：B
解析：句意“在金星上有充足的水和氧气”。从文章中可以看出金星上缺乏水和氧气。因此才需要想办法来制造氧气和降雨。
18. 答案：A
解析：地球人口在继续增长，第1段中就提到了这一点。
19. 答案：B
解析：科学家已经在金星上种植藻类来为人类创造一个新世界。文中提到的这个方法还只是个设想，并未实施。
20. 答案：A
解析：只有金星上下雨人们才能踏上金星。文章最后提到雨水可以降低金星的温度，这样人们才能踏上金星。
21. 答案：C
解析：在21世纪居住在金星上的愿望就会实现。文章并未提及。
22. 答案：B
解析：藻类是一种可以产生氧气的植物。文章第3段中提到藻类可以分解二氧化碳从而产生氧气，而它本身是不能产生氧气的。
2.
「正确答案」
23－30 CEAB CDEB
「答案解析」 23. 答案：C
解析：这段讲的是人口继续增长的情况。
24. 答案：E
解析：这里主要讲出生率降低的几个原因。
25. 答案：A
解析：这里讲到中国的人口状况。
26. 答案：B
解析：第1句是关键句。
27. 答案：C
解析：最后一句即是。
28. 答案：D
解析：第2段可以得到答案。
29. 答案：E
解析：第3段中讲的原因之一。
30. 答案：B
解析：第2段中提到这一点。
3.
「正确答案」 31－35 CDABB
「答案解析」
31. 答案：C
解析：此题为细节题。参见第三段前三句，these wants中的these此处指housing and clothing.
32. 答案：D
解析：此题为推断题。参见第三段后两句，a great majority of Americans与本题中的most Americans相关。
33. 答案：A
解析：此题为细节题。参见第四段第三句前半句“while the other levels involve physical satisfaction the feeding, comfort, safety, and transportation of the human body……”
34. 答案：B
解析：此题为主旨题。参见第四段第三句后半句“……this level stresses mental needs for recognition, achievement, and happiness.”
35. 答案：B
解析：此题为主旨题。参见第六段最后一句“……we now may seek to ensure the health, safety, and leisure to enjoy mole fully the good things on the first four levels.”
4.
「正确答案」 36－40 DCBBB
「答案解析」 36. 答案：D
解析：事实题。由文章第一段第二句“Ronald Callahan, son of……told reports that he expects his companys offering price to be high enough to win out over other offers”可看出，CMS的出价应该高于其他竞争者。换言之，CMA的出价具有很强的竞争力，所以D为正确答案。
37. 答案：C
解析：事实题。文章第二段第四句“Her success in raising the newspaper……gained Callahan the attention and respect of the British news establishment.”（她在提高新闻报导水平和使先驱报变为赢利的企业上的成功为她赢得了英国报界的关注和尊敬。）所以C为正确答案。
38. 答案：B
解析：事实题。文章最后一段第一句话“If CMA becomes the owner of NBS，for the first time it will have controlled over a nationwide to network.”（假如CMA成为NBS的主人，则它将会第一次控制全国范围的电视机构。）也就是说，到目前为止，CMA尚未成为全国性的电视机构。所以B为正确答案。
39. 答案：B
解析：事实题。文章最后一段“……but he expressed fears that the new management was going to make coverage on NBS irresponsible”一句指出，NBS负责人担心的是并购后对NBS的影响问题。B项：他希望并购不会影响体制的名声，这与原文一致。所以B为正确答案。
40. 答案：B
解析：主旨题。从全文的篇章结构来看，主要篇幅都讲述了CMA从英国到美国的简短的发展史，而收购NBS只是其中的一小部分。所以B为正确答案。
「正确答案」 41－45 BDDCA
「答案解析」 41. 答案：B
解析：此题为推断题。答案寓于第三段第二句，这里的关键词语是“with any commercial consequence”（具有任何商业目的）。
42. 答案：D
解析：此题为词义题。关键句是第四段的第一句。“It was to Maury of the US Navy that The Atlantic Telegraph Company turned……”是一个强调句，被强调的部分是题干句的宾语，而题干句用的也是一个强调句，被强调的部分换成了原句的主语。
43. 答案：D
解析：此题为词义题。关键句是第四段的第二句。
44. 答案：C
解析：此题为推断题。可用排除法解题。根据第五段，defied的上文说明的是当人们拿出电缆线时，发现电缆线上覆盖着生物，从而否定了选项B和D；下文说的则是当时科学的看法，即海底不存在生物。既然事实摆在眼前，也就无需再怀疑什么了，因此可以否定选项A.
45. 答案：A
解析：此题为主旨题。文章主要讲述的是海洋地理学是如何兴起的。
6.
「正确答案」 46－50 DFAEB
「答案解析」 46. 答案：D
解析：从下一句就可以知道太空飞行器还只是用于科研阶段，而且是十分危险的，那么这句可以是对进一步进入到太空的一种预测，即虽然已经可以将人类送到轨道上去了，但要飞得更远还是很困难的。
47. 答案：F
解析：从下文知道，目前人类已经在努力开辟新的空间来居住，但是这种探索还只是开始，还有很长的路要走。
48. 答案：A
解析：这段讲到人类在探索太空方面的进展，这里提到太空旅行的事情，后一句又提到了太空穿梭机，那么A项中提到的太空站应是令人兴奋的最新进展，是符合上下文的。
49. 答案：E
解析：从后一句中的问句中，可以推断出答案，即发现星球和发现生命是有很大区别的。
50. 答案：B
解析：从前一句的“But even if that were true……”可以推论出到外星球居住的前景并不是那么令人乐观的。
「正确答案」 51－55 DBACD 56－65 BCAAB 61－65 CBCAD
「答案解析」 51. 答案：D
解析：从上下文看，古代人认为宇宙是不变的，这个观点是十分错误的。
52. 答案：B
解析：从even一词可看出，这里指的应该是望远镜被发明之前。
53. 答案：A
解析：从前半句的appear可推断出这里是disappear.
54. 答案：C
解析：从下一句可以看出曾经被误认为新出现的星星其实已经很久远了而且正在走向消亡。
55. 答案：D
解析：as要这里引导一个时间状语从句，表示“随着……”。
56. 答案：B
解析：at a speed of……以……的速度，只能用at.
57. 答案：C
解析：visible可见的，下句说这些星星很亮，那么肯定是肉眼能看见的。noticeable醒目的，意思并不确切。
58. 答案：A
解析：consume energy表示“消耗精力”。
59. 答案：A
解析：every+时间／距离，表示“每隔……”。
60. 答案：B
解析：上半句说其他星星并不会慢慢地消亡，所以可以推断出它们会由于一次爆炸而完全被毁灭掉。
61. 答案：C
解析：be known as……：…被称作…。be known for……：因……而出名。
62. 答案：B
解析：be equivalent to sth：与…相等，等同。
63. 答案：C
解析：这是一个虚拟句，从前半句可以得到正确答案。
64. 答案：A
解析：根据整句话的意思可以得到答案。
65. 答案：D版权所有www.for68.com
解析：long after……：在…之后很长一段时间，根据上下文可以得到答案。long before：很久之前。
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