东财学位英语完型题库

5. Part IV Cloze (20 points) An adult giraffe's head is about six feet above its heart. This means that to 36 enough blood up to the brain the circulatory 37 must be strong enough to keep the blood at very high pressure. Biologists have known for some time that giraffes solve this problem by having 38 high blood pressure, about 39 that of human beings. But an international team of biologists began to 40 about this. If giraffes have such high blood pressure, they should have a 41 problem with swelling in their legs and feet. Why don’t giraffes have swollen feet? Giraffes should have 42 problem, too. Every time they bend heads 43 to drink, the blood should 44 to their heads and have a hard time 45 back up (when the head is down) to the heart. How come giraffes don't black out when they drink? The answer to the 46 feet problem, the researchers found, is that giraffes have 47 the researchers call a “natural anti-gravity suit”. It 48 out that the skin and other 49 in their legs and feet are 50 stiffer and tougher than those of other 51 . As a result, the blood vessels in the leg cannot swell. Therefore, the blood has nowhere to go but back to the heart. What about blood rushing to the head 52 the giraffe bends down to drink? The researchers found that the giraffe’s jugular vein, which 53 blood from the head back to the heart, has lots of one-way valves in it. In the giraffe’s neck, there are lots of muscles that flex and relax repeatedly as the animal moves its head and sucks 54 drinking water. By squeezing the valve jugular vein, they 55 blood moving back to the heart even while the animal is drinking. 36. A. bring B. produce C. transfer D. pump 37. A. structure B. system C. function D. organism 38. A. unusually B. generally C. uncomfortably D. commonly 39. A. half B. multiple C. double D. pair 40. A. investigate B. wonder C. undertake D. learn 41. A. terrible B. unreliable C. unsolvable D. advisable 42. A. other B. some C. others D. another 43. A. up B. down C. toward D. aside 44. A. crush B. brush C. push D. rush 45. A. following B. returning C. plowing D. pouring 46. A. healthy B. swollen C. dreary D. radical 47. A. what B. where C. that D. those 48. A. reveals B. indicates C. figures D. turns 49. A. tissues B. vessels C. pores D. organs 50. A. many B. very C. much D. less 51. A. giraffes B. animals C. people D. creatures 52. A. whenever B. whatever C. however D. wherever 53. A. reflects B. releases C. receives D. carries 54. A. in B. up C. to D. from 55. A. permit B. prevent C. retain D. keep 7. Part IV Cloze (20 points) Before the 20th century, the horse provided day to day transportation in the United States. Trains were used only for long-distance transportation. Today the car is the most popular 36 of transportation in all of the United States. It has completely 37 the horse as a means of everyday transportation. Americans use their car for 38 90 percent of all personal 39 . Most Americans are able to 40 cars. The average price of a 41 made car was, 500 in 1950, 740 in 1960 and up 42 750 in 1975. During this period American ear manufacturers set about 43 their products and work efficiency. Meanwhile, the yearly income of the 44 family increased from 1950 to 1975 45 than the price of cars. For this reason, 46 a new car takes a smaller 47 of a family’s total earnings today. In 1951 48 it took 8.1 months of an average family's 49 to buy a new car. In 1962, a new car 50 8.3 of a family’s annual earnings. By 1975 it only took 4.75 51 income. In addition, the 1975 cars were technically 52 to models from previous years. The 53 of the automobile extends throughout the economy 54 the car is so important to Americans. Americans spend more money 55 their cars running than on any other item. 36. A. kinds B. means C. mean D. types 37. A. denied B. reproduced C. replaced D. ridiculed 38. A. hardly B. nearly C. certainly D. somehow 39. A. trip B. works C. business D. travel 40. A. buy B. sell C. race D. see 41. A. quickly B. regularly C. rapidly D. recently 42. A. on B. to C. in D. about 43. A. raising B. making C. reducing D. improving 44. A. unusual B. interested C. average D. big 45. A. slowest B. equal C. faster D. less 46. A. bringing B. obtaining C. having D. purchasing 47. A. part B. half C. number D. side 48. A. clearly B. proportionally C. obviously D. suddenly 49. A. income B. work C. plants D. debts 50. A. used B. spent C. cost D. needed 51. A. months B. dollar C. family D. year 52. A. famous B. quick C. superior D. inferior 53. A. running B. notice C. influence D. discussion 54. A. then B. so C. as D. which 55. A. starting B. leaving C. keeping D. repairing