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. plowin g 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.