大学英语四级模拟试题(2)

　　CLOZE
　　There was a time when parents who wanted an educational present for their children would buy a typewri- ter, a globe or an encyclopedia set（¨°？¨？？a？？¨＇？？¨¨？¨o¨|）。 Now those __51__ 51. A） items B） toys seem hopelessly old-fashioned： this C） sets D） series Christmas, there were a lot of __52__ 52. A） private B） children C） school D） personal computers under the tree. __53__ that 53. A） given B） Provided computers are their key to success, C） Convinced D） Believed parents are also frantically insisting that children __54__ taught to use them 54. A） are B） be in school——as early as possible. C） are being D） were The problem for schools is that when it __55__ computers, parents do 55. A） talks about B） comes to not always know best. C） turns to D） mentions Many schools are __56__ parental 56. A） ignorant of B） blaming impatience and are purchasing hardware C） yielding to D） turnin a deaf ear to（¨？2？t） __57__ sound educational plan- 57. A） without B） with ning so they can say,“Ok, we've moved C） through D） for into the computer age.”Teachers __58__ 58. A） relied on B） relaxed themselves caught in the middle of the C） freed D） found problem —— between parent pressure and __59__ educational decisions. 59. A） wise B） clever C） slow D） enough Educators do not even agree __60__ 60. A） on B） with how computers should be used. A lot of C） to D） about money is going for computerized educa- tional materials __61__ research has 61. A） however B） where C） what D） that shown can be taught __62__ with pencil 62. A） equally and paper. Even those who believe that B） in the same way C） just as well D） not as well all children should __63__ to computer, 63. A） be open B） have access C） look D） turn warn of potential __64__ to the very 64. A） approaches B） exposures young. C） dangers D） laziness The temptation（¨？？？¨？） remains strong largely because young children __65__ 65. A） adopt B） keep so well to computers. First graders have C） adapt D） devote been__66__ willing to work for two hours 66. A） watched B） seen on math skills. Some have an attention C） told D） taught span of 20 minutes. __67__ school can 67. A） High B） Not every afford to go into computing, and that C） No D） Any creates __68__ another problem： a divi- 68. A） already B） of course sion between the haves and have-nots. C） in addition D） yet Very few parents ask __69__ computer 69. A） for B） against instruction in poor school districts, C） to buy D） to use __70__ there may be barely enough money 70. A） due that B） in any case to pay the reading teacher. C） although D） where
　　READING COMPREHENSION
　　Questions 71 to 75 are based on the following passage：
　　The failed Skylab will come screaming home to earth in disappointmentsometime next month, but it will fall we know not where. That precise information is beyond even the calculations of scientistsand their computers. The best they can tell us is that the space station, weighing 77 tons andas high as a 12-story building, will break into hundreds of pieces that willbe scattered across a track 100 miles wide and 4,000 miles long. We are again exposed to one of those unexpected adventures, or misadven-tures, of science that attracts our attention from the boring routines ofdaily existence and encourages us to think a lot about man's future. What worries Richard Smith, the Skylab's director, is the'big pieces'that will come through the atmosphere. Two lumps, weighing 2 tons each, andten, weighing at least 1,000 pounds each, will come in at speeds of hundredsof miles an hour, and if they crash on land they will dig holes up to 100feet deep. What worries us, with our lack of scientific knowledge and our quickimagination, is both the big and little pieces, although project officialssay there is a very small chance that anyone will be injured by them. That's good to know , but it doesn't remove the doubts of the millionswho still remember the nuclear accident at Three Mile Island. That accidenttook place in 1979 in spite of what scientists had assured us as to thesafety of the nuclear reactor.
　　71. Where the Skylab will fall _______. A） is kept secret B） will be announced soon C） is predicted by scientists D） can't be predicted
　　72. The broken Skylab will be _______. A） in two lumps——one weighing 2 tons and the other weighing 10 tons B） falling with the force of a 12-story building C） composed of 12 big pieces and hundreds of smaller pieces D） an attractive scene to millions of people
　　73. The author suggests that _______. A） the danger of the Skylab's fall has been overestimated B） it's useless to worry over things you can't do anything about C） computers can solve the problem caused by the broken Skylab D） the danger of the Skylab's fall has been underestimated
　　74. The author refers to Three Mile Island _______. A） because he fears that a piece of the Skylab may strike a nuclear power plant B） as a doubtful comment on the officials' words C） because he is afraid of nuclear power D） because the nuclear reactor there and the Skylab were built by the same company
　　75. The author expresses his _______. A） interest in the failure of the Skylab B） willingness to give his advice C） doubtful attitude toward scientists D） eagerness to see more new scientific discoveries
　　Questions 76 to 80 are based on the following passage：
　　Any talk of the energy needs of the United States should include adiscussion of the Tennessee Valley Authority, a successful but sometimesquiet federal agency. The Tennessee valley Authority began life in 1933 asone of the public works agencies designed to help fight the Great Depression.The TVA was first meant to employ thousands of men to build a chain of damsdown the Tennessee River. These dams were to include electric plants forgenerating electricity to provide cheap power for the rural land in thevalley area. Within ten years, most of the homes in the TVA area had electricity. Intwenty years, there were four times as many homes in the area with power.At first , TVA electrcity cost a penny per kilowatt. Many homes in the arearelied on electricity for heating. This results in criticism now that elec-tricity is more than three pennies per kilowatt. Other criticism has beenaimed at the TVA's other methods of generating power in 1975. The Authoritywas sued（？e？？） for polluting the air with its coal-generating plants. Anti-nuclear groups point out that the TVA would soon have a total of seventeenatomic reactor plants supplying power for its service area. But the TennesseeValley Authority has adjusted to the new times. It quickly became a modelfor pollution control at its coal plants. Just as quickly the TVA founditself an energy conserver as well as a producer. The TVA conducts freehome energy consultations and offers cheap loans to consumers who want toinstall insulation storm windows, solar energy equipment or woodburningstoves. The resulting decrease in demand has allowed the TVA to postponeor delay construction of two nuclear reactors. Instead, the Authority isbuilding a plant to extract coal gas from low-grade coal. Their first stepwill be to use the coal gas to make an ammonia（？？？a） fertilizer for farmersin the TVA service area. Their ultimate goal is to produce a syntheticfuel from the coal gas. The TVA will then be once again producing a cheapersource of energy and helping solve the nation's problems, several at atime.
　　76. The main idea of this passage is that ____________. A） electricity purchased by TVA's customers has tripled in price. B） the TVA has not served its function well. C） the TVA is dangerous to the environment. D） the TVA has always been a pioneer in the energy field.
　　77. According to the passage, which of the following statements is NOT true？
　　A） The Tennessee Valley Authority was created in 1933. B） The TVA's initial function was to provide work for the unemployed. C） The TVA has been making an effort in decreasing the number of nuclear reactor plants it depends on. D） The TVA is interested in producing coal gas from low-grade coal.
　　78. We can conclude from the passage that ____________. A） the TVA no longer supplies electricity for heating B） before the time of the TVA, few homes in the Tennessee valley had electricity C） the TVA has not had to rely on atomic reactor for its power D） coal gas is expensive to produce
　　79. The passage suggests that ____________. A） the TVA is now privately owned B） the TVA is more interested in what is good for the nation than in making money C） synthetic fule is cheaper to produce than electricity D） ammonia fertilizers are nonpolluting
　　80. As used in this passage, the word “extract” means ____________. A） burn B） reshape C） defy D） remove from