[外语类试卷]大学英语四级模拟试卷698及答案与解析.doc

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1、大学英语四级模拟试卷 698及答案与解析 一、 Part I Writing (30 minutes) 1 For this part, you are allowed 30 minutes to write a short essay entitled Punctuality. You should write at least 120 words following the outline given below. 1守时是个好习惯 2不守时会带来很多麻烦 3要养成守时的习惯 二、 Part II Reading Comprehension (Skimming and Scanning)

2、(15 minutes) Directions: In this part, you will have 15 minutes to go over the passage quickly and answer the questions attached to the passage. For questions 1-7, mark： Y (for YES) if the statement agrees with the information given in the passage; N (for NO) if the statement contradicts the informa

3、tion given in the passage; NG (for NOT GIVEN) if the information is not given in the passage. 1 Our Future in Space: It Has Already Begun! We are all space travelers. But weve stayed close to home until now. One day, we may leave our “mother-ship“ Earth to make our home among the stars. A giant, sph

4、erical “spaceship“,about 8,000 miles in diameter, is speeding through the solar system right now. It is cruising at an incredible 66,600 miles per hour. Its not a giant, Star Wars mother-ship. Its spaceship Earth, the home of over four billion people. This water coated spaceship has been traveling t

5、hrough the universe for about five billion years. Only within the past 25 years, however, have some of its passengers broken free of Earths gravity. But 25 years from now, many people, including you, might live in an orbiting space station 200 miles above the Earth. Space Cities Scientists have alre

6、ady designed special space factories. These factories will take advantage of the absence of gravity (zero gravity) to produce everything from life-saving drugs to perfect ball bearings. Other scientists have designed space colonies, complete with farms, schools, and artificial day and night. Hundred

7、s, or even thousands, of people will live, work, play even go to school, far above the Earth. Our conquest of space, of course, has already begun. We have explored part of the Moon,sent robot spaceships onto the surface of Venus and Mars, and aimed space probes past the planets of Jupiter and Saturn

8、. Last June, one robot ship, Pioneer 10, left our solar system forever. And astronauts from the United States have lived in space stations. The conquest of space, without question, is one of the greatest adventures human beings have ever set out on. But it may be more than a great adventure. Some sc

9、ientists think the conquest of space may be a necessity for survival of the human species. We are tearing up more and more of the Earth to get raw materials for industry. And we are polluting the air and water as we manufacture products that we need or want. Almost everything that seems to make our

10、lives more comfortable, and from electricity to pesticides, uses up or alters a piece of our planets natural environment. Why Go into Space? Yet our solar system is full of resources. The moon is chock-full of valuable metals. So are the asteroids, the small, rocky, planet-like bodies orbiting the s

11、un most of them between Mars and Jupiter. These metals, if we can get them, could be used to build factories and space stations. Also, in space, there is no atmosphere to filter out the suns energy. There is plenty of solar energy to be turned into electricity for manufacturing, for creating comfort

12、able living conditions. Getting away from Earth has other advantages, too. Modern industry uses many kinds of metal alloys (mixtures of metal that are better for certain purposes than pure metals). Yet some metal alloys either cant be made or are very expensive to make on Earth because of gravity. F

13、or instance, certain metals dont mix well on Earth. But in zero gravity, molten (hot, liquid) metals mix more evenly. This is because there is no gravity to pull the heavier metals down, while the lighter ones float on top. From space, too, we can look down on the Earth and study the atmosphere, its

14、 weather, and the effects of air pollution. And because there is no strong gravity to break free from, our future homes away from Earth will be convenient starting points for travel to distant planets. But, while going into space might solve some problems, outer space can also be a dangerous place.

15、For example, in outer space, we have to protect ourselves from the dangers of ultraviolet light and cosmic rays. Ultraviolet light from the sun can give us bad sunburns right here on Earth. Yet, Earths atmosphere screens out most of that harmful radiation. Cosmic rays are tiny high energy particles

16、from outer space. Again, the Earth shields us from most of them. At Home in Space? But in space, without special protection, we would be exposed to much stronger radiation from ultraviolet light and cosmic rays. Also, in the zero gravity of outer space, our bones will lose calcium and become weaker.

17、 This will be more of a problem the longer people stay out in space. Doctors are looking for a way to keep our bones from losing calcium in outer space. And a small spaceship just might “drive you batty“ after a while. But even on a short trip in outer space, you might not feel as well as youd like

18、to. Space travel could make you seasick! Yet, these risks wont keep people from going into space. Eventually, an Earth-like environment will be built in space. And they will be populated by people with many different interests: medicine, construction, farming, teaching, mining, and so on. The next h

19、undred years will be filled with other worldly adventures, exciting scientific discoveries, and danger, as humans leave Earth perhaps forever. Aging in Space Suppose a space traveler is moving at a velocity of 186,200 miles per second. For every hour that passes for him, 30 hours pass on Earth. If h

20、e travels for a year in this fashion (having accelerated instantaneously) and then turns around and comes back at this speed (having turned around instantaneously), he will find that while he has seemed to himself to have traveled two years, the men on Earth would claim he had been absent for 30 yea

21、rs. Suppose the space traveler had left at the age of 30, leaving behind a twin brother also aged 30. When he returned he would be 32, but his stay-at-home twin brother would be 60. That is why the “clock paradox“, is sometimes called the “twin paradox“. Of course it takes quite a long while to acce

22、lerate to a high speed, and a long while to make a turn and head back again, so conditions arent quite as clear-cut as just described. 2 The giant, spherical spaceship mentioned in the passage is_. （ A） the outer space （ B） a man-made spaceship （ C） the planet Earth （ D） the Star Wars mother-ship 3

23、Some persons have traveled into outer space after conquering_ within the past 25 years. （ A） the universe （ B） Earths gravity （ C） the earth （ D） outer space 4 We have explored or sent robot spaceships to the following space except_. （ A） the moon （ B） Venus （ C） Jupiter （ D） Mars 5 Why is the conqu

24、est of space more than a great adventure? （ A） Because it is full of challenges for human beings. （ B） Because it may be necessary for human beings to survive. （ C） Because it is the greatest adventure in human history. （ D） Because it is more exciting than any other adventures. 6 The moon and the a

25、steroids are alike with respect to their_. （ A） size and moving ways （ B） comfortable living conditions （ C） rich and valuable metals （ D） solar energy 7 Why cant ultraviolet light scorch our skin on Earth as seriously as it does in space places? （ A） Because the Earths atmosphere can make ultraviol

26、et light less harmful. （ B） Because ultraviolet cant reach the Earth at all. （ C） Because the Earth is far away from those planets radiating ultraviolet light. （ D） Because other space places is near from those planets radiating ultraviolet light. 8 In spite of many risks, scientists will finally bu

27、ild space suitable for humans to live_. （ A） an environment without ultraviolet light （ B） a lot of homes （ C） an Earth-like environment （ D） an environment with atmosphere 9 The reason some metal alloys cant be made on Earth is that the heavier metals_together with the lighter ones. 10 In space, th

28、ere is no atmosphere to filter out the suns energy. There is plenty of solar energy to be turned into_for creating comfortable living conditions. 11 According to the author_will be caused to a man in gravity-free space. Section A Directions: In this section, you will hear 8 short conversations and 2

29、 long conversations. At the end of each conversation, one or more questions will be asked about what was said. Both the conversation and the questions will be spoken only once. After each question there will be a pause. During the pause, you must read the four choices marked A, B, C and D, and decid

30、e which is the best answer. （ A） In Jersey. （ B） In Arizona. （ C） In Mexico. （ D） In Philadelphia. （ A） The train is crowed. （ B） The train is on time. （ C） The train is empty. （ D） The train is late. （ A） Because youll have no knowledge of the background. （ B） Because youll know something about wha

31、ts going to hear next. （ C） Because youll have to pay so much attention to words. （ D） Because youll have to read a lot of reading materials. （ A） Bill just learned to play the piano. （ B） Bill is proud of himself. （ C） Bill actually cant play the piano. （ D） Bill plays the piano very well. （ A） The

32、 man sits in the park in spring at weekend. （ B） The man does some odd jobs in winter at weekend. （ C） The man goes for long walks in autumn at weekend. （ D） The man likes to paint his house in summer at weekend. （ A） She is all right now. （ B） She is in hospital. （ C） She feels unhappy. （ D） She is

33、 under operation now. （ A） Go to take some fast food with the man. （ B） Eat after her class. （ C） Join some friends for a quick meal. （ D） Go to her class. （ A） At a bus stop. （ B） At the gate of theater. （ C） At a phone booth. （ D） At the airport. （ A） Take part in an English Summer Camp. （ B） Trav

34、el around the whole Europe. （ C） Teach the students in poor areas. （ D） Visit the places with historical significance in America. （ A） He has never been to Gettysburg. （ B） He takes a political science course. （ C） His family still goes on vacation together. （ D） Hes interested in the Civil War. （ A

35、） Why his parents wanted to go to Gettysburg. （ B） Why his familys vacation plans changed ten years ago. （ C） Where his family went for a vacation ten years ago. （ D） When his family went on their last vacation. （ A） From a friend. （ B） On the television. （ C） In the local newspaper. （ D） On the rad

36、io. （ A） Having the right qualifications and experience. （ B） Working from ten in the morning until two in the afternoon. （ C） Writing an advertisement for the local newspaper. （ D） Serving a firm in spare time. （ A） She has no job yet. （ B） She works for a small firm. （ C） She is a consultant engin

37、eer. （ D） She works for the man. （ A） An advertisement in the paper. （ B） The details of a possible job. （ C） A small firm of consultant engineers. （ D） An interview for waitress job. Section B Directions: In this section, you will hear 3 short passages. At the end of each passage, you will hear som

38、e questions. Both the passage and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A, B, C and D. （ A） How to select a can of tomatoes. （ B） How to prepare nutritious and delicious meals. （ C） How to spend money wisely on

39、 food. （ D） How to shop with young children. （ A） Make a shopping list before going to the store. （ B） Dont go shopping when hungry. （ C） Buy the food in larger size can save money. （ D） Dont go shopping with kids. （ A） To find out whether there is a sale in certain food. （ B） To find out what food

40、is less expensive. （ C） To find the food you need. （ D） To find out what is the nutritious food. （ A） Eight. （ B） Four. （ C） Twelve. （ D） Fourteen. （ A） The state government. （ B） The local communities. （ C） The federal government. （ D） The city government. （ A） Private universities. （ B） Colleges s

41、upported by states or cities. （ C） Colleges supported by private foundations. （ D） Specialized schools. （ A） The plane that crashed was returning from a trade fair. （ B） The plane that crashed was on a regular flight to Carlisle. （ C） The plane that crashed was flying some businessmen to London. （ D

42、） The plane that crashed was not on a regular flight. （ A） At a local scenic spot. （ B） At a place of historical interest. （ C） At an archaeological museum. （ D） At a military training camp. （ A） The local ambulance and firemen immediately came to the rescue. （ B） All the passengers were killed. （ C

43、） Additional help was unnecessary. （ D） Help was long delayed. （ A） He remembered everything that happened. （ B） He had only an incomplete picture of what happened. （ C） He remembered speaking to the pilot. （ D） He heard and saw nothing at all. Section C Directions: In this section, you will hear a

44、passage three times. When the passage is read for the first time, you should listen carefully for its general idea. When the passage is read for the second time, you are required to fill in the blanks numbered from 36 to 43 with the exact words you have just heard. For blanks numbered from 44 to 46

45、you are required to fill in the missing information. For these blanks, you can either use the exact words you have just heard or write down the 36 Have you ever 【 B1】 _what other people do with their old computers? In the past they have often paid high prices for their old computers, but how much do

46、 you think these computers are 【 B2】 _ now? Few people want to buy a computer which has become obsolete or has been 【 B3】 _by a 【 B4】 _model. Unfortunately, the only thing they can do with a computer which they have had for five or six years is to throw it away with their other 【 B5】 _! What do many

47、 people do when they try to sell their old computer? 【 B6】 _, they take into 【 B7】 _its original cost and then 【 B8】 _the price according to the age of the computer rather like a second-hand car. They forget that 【 B9】 _. One well-known computer magazine recently compiled a list of ten things to do

48、with an old computer. One suggestion was to 【 B10】 _. The final suggestion was to store it in a safe place and hope that it would become a collectors item in fifteen or twenty years. Whatever you decide to do with an old computer 【 B11】 _. The world of computers is quickly changing and eventually al

49、l computers will not only be integrated with video telephones and run CD ROM disks but will also be able to perform a countless number of tasks which as yet we cannot even envisage. 37 【 B1】 38 【 B2】 39 【 B3】 40 【 B4】 41 【 B5】 42 【 B6】 43 【 B7】 44 【 B8】 45 【 B9】 46 【 B10】 47 【 B11】 Section A Directions: In this section, there is a passage with ten blanks. You are required to select one word for each blank from a list of choices g