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大学英语四级完型填空练习及答案

CET-4 Cloze

Passage 1

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 67 of transportation in all of the United States. It has completely 68 the horse as a means of everyday transportation. Americans use their car for 69 90 percent of all personal 70 .

Most Americans are able to 71 cars. The average price of a 72 made car was, 500 in 1950, 740 in 1960 and up 73 750 in 1975. During this period American car manufacturers set about 74 their products and work efficiency.

Meanwhile, the yearly income of the 75 family increased from 1950 to 1975 76 than the price of cars. For this reason, 77 a new car takes a smaller 78 of a family's total earnings today.

In 1951 79 it took 8.1 months of an average family's 80 to buy a new car. In 1962, a new car 81 83%of

a family's annual earnings. By 1975 it only took 4.75 82 income. In addition, the 1975 cars were technically

83 to models from previous years.

The 84 of the automobile extends throughout the economy 85 the car is so important to Americans. Americans spend more money 86 their cars running than on any other item.

67. [A] kinds [B] means [C] mean [D] types

68. [A] denied [B] reproduced [C] replaced [D] ridiculed

69. [A] hardly [B] nearly [C] certainly [D] somehow

70. [A] trip [B] works [C] business [D] travel

71. [A] buy [B] sell [C] race [D] see

72. [A] quickly [B] regularly [C] rapidly [D] recently

73. [A] on [B] to [C] in [D] about

74. [A] raising [B] making [C] reducing [D] improving

75. [A] unusual [B] interested [C] average [D] big

76. [A] slowest [B] equal [C] faster [D] less

77. [A] bringing [B] obtaining [C] having [D] purchasing

78. [A] part [B] half [C] number [D] side

79. [A] clearly [B] proportionally [C] obviously [D] suddenly

80. [A] income [B] work [C] plants [D] debts

81. [A] used [B] spent [C] cost [D] needed

82. [A] months [B] dollar [C] family [D] year

83. [A] famous [B] quick [C] superior [D] inferior

84. [A] running [B] notice [C] influence [D] discussion

85. [A] then [B] so [C] as [D] which

86. [A] starting [B] leaving [C] keeping [D] repairing

Passage 2

To be a good teacher, you need some of the gifts of a good actor: you must be able to 62 the attention and interest of your students: you must be a 63 speaker, with a good, strong, 64 voice which is fully under your control: and you must be able to 65 what you are teaching in order to make its meaning clear. 66 a good teacher and you will see that he does not sit still 67 his class: he stands the whole time when he is teaching; he walks about, using his 68 , hands and fingers to help him in his explanations, and his face to express feelings. Listen to him, and you will 69 the loudness, the quality and the musical note of his voice always 70 according to what he is 71 about. The fact that a good teacher has some of the gifts of a good actor doesn't 72 that he will indeed be able to act 73 on the stage, for there are very important 74 between the teacher's work and the actor's. The actor has to speak words which he has learnt by heart' he has to repeat exactly the 75 words each time he plays a certain part; 76 his movements and the ways in which he uses his voice are usually 77 beforehand. What he has to do is to make all these carefully learnt words and actions seem 78 on the stage.

A good teacher 79 in quite a different way. His students take an active part in his 80 : they ask and answer questions; they obey orders; and if they don't understand something, they will say so. The teacher therefore has to suit his act to the needs of his students. He cannot learn his part by heart, but must 81 it as he goes along.

62. [A] pay [B] hold [C] give [D] know

63. [A] clear [B] slow [C] quick [D] loud

64. [A] frightening [B] exciting [C] fearing [D] pleasing

65. [A] act [B] talk [C] say [D] repeat

66. [A] Listen [B] Watch [C] Look [D] Observe

67. [A] for [B] behind [C] before [D] with

68. [A] tongue [B] words [C] sound [D] arms

69. [A] hear [B] see [C] think [D] guess

70. [A] making [B] changing [C] expressing [D] giving

71. [A] talking [B] thinking [C] hearing [D] saying

72. [A] tell [B] express [C] show [D] mean

73. [A] good [B] badly [C] well [D] actively

74. [A] things [B] differences [C] points [D] jobs

75. [A] different [B] same [C] above [D] following

76. [A] just [B] never [C] ever [D] even

77. [A] read [B] known [C] fixed [D] written

78. [A] natural [B] real [C] false [D] clear

79. [A] is [B]behaves [C] works [D] teaches

80. [A] group [B] party [C] class [D] play

81. [A] invent [B] discover [C] teach [D] continue

Passage 3

An adult giraffe's head is about six feet above its heart. This means that to 67 enough blood up to the brain the circulatory 68 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 69 high blood pressure, about 70 that of human beings. But an international team of biologists began to 71 about this. If giraffes have such high blood pressure, they should have a 72 problem with swelling in their legs and feet. Why don't giraffes have swollen feet?

Giraffes should have 73 problem, too. Every time they bend heads 74 to drink, the blood should 75 to their heads and have a hard time 76 back up (when the head is down) to the heart. How come giraffes don't black out when they drink?

The answer to the 77 feet problem, the researchers found, is that giraffes have 78 the researchers call a "natural anti-gravity suit". It 79 out that the skin and other 80 in their legs and feet are 81 stiffer and tougher than those of other 82 . 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 83 the giraffe bends down to drink? The researchers found that the giraffe's jugular vein, which 84 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 85 drinking water. By squeezing the valved jugular vein, they 86 blood moving back to the heart even while the animal is drinking.

67. [A] bring [B] produce [C] transfer [D] pump

68. [A] structure [B] system [C] function [D] organism

69. [A] unusually [B] generally [C] uncomfortably [D] commonly

70. [A] half [B] multiple [C] double [D] pair

71. [A] investigate [B] wonder [C] undertake [D] learn

72. [A] terrible [B] unreliable [C] unsolvable [D] advisable

73. [A] other [B] some [C] others [D] another

74. [A] up [B] down [C] toward [D] aside

75. [A] crush [B] brush [C] push [D] rush

76. [A] following [B] returning [C] plowing [D] pouring

77. [A] healthy [B] swollen [C] dreary [D] radical

78. [A] what [B] where [C] that [D] those

79. [A] reveals [B] indicates [C] figures [D] turns

80. [A] tissues [B] vessels [C] pores [D] organs

81. [A] many [B] very [C] much [D] less

82. [A] giraffes [B] animals [C] people [D] creatures

83. [A] whenever [B] whatever [C] however [D] wherever

84. [A] reflects [B] releases [C] receives [D] carries

85. [A] in [B] up [C] to [D] from

86. [A] permit [B] prevent [C] retain [D] keep

Passage 4

Today, most countries in the world have canals. Many countries have built canals near the coast, and parallel 67 the coast. Even in the twentieth century, goods can be moved more cheaply by boat than by any other 68 of transport. These 69 make it possible for boats to travel 70 ports along the coast without being 71 to the dangers of the open. Some canals, such as the Suez and the Panama, save ships weeks of time by making their 72 a thousand miles shorter. Other canals permit boats to reach cities that are not 73 on the coast; still other canals 74 lands where there is too much water, help to 75 fields where there is not enough water, and 76 water power for factories and mills. The size of a canal 77 on the kind of boats going through it. The canal must be wide enough to permit two of the largest boats using it to 78 each other easily. It must be deep enough to leave about two feet of water 79 the keel of the largest boat using the canal. When the planet Mars was first 80 through a telescope, people saw that the round disk of the planet was crises-crossed by a 81 of strange blue-green lines. These were called "canals" 82 they looked the same as canals on earth 83 are viewed from an airplane. However, scientists are now 84 that the Martian phenomena are really not canals. The photographs 85 from space-ships have helped us to 86 the truth about the Martian "canals".

67. [A] off [B] with [C] to [D] by

68. [A] way [B] means [C] method [D] approach

69. [A] waterways [B] waterfronts [C] channels [D] paths

70. [A] among [B] between [C] in [D] to

71. [A] revealed [B] exposed [C] opened [D] shown

72. [A] trip [B] journey [C] voyage [D] route

73. [A] lain [B] stationed [C] set [D] located

74. [A] escape [B] drain [C] dry [D] leak

75. [A] water [B] wet [C] soak [D] irrigate

76. [A] furnish [B] afford [C] offer [D] give

77. [A] focuses [B] bases [C] depends [D] takes

78. [A] cross [B] pass [C] move [D] advance

79. [A] down [B] beneath [C] below [D] off

80. [A] studied [B] researched [C] surveyed [D] observed

81. [A] plenty [B] number [C] deal [D] supply

82. [A] although [B] because [C] so [D] if

83. [A] that [B] where [C] when [D] as

84. [A] exact [B] definite [C] certain [D] decisive

85. [A] held [B] taken [C] got [D] developed

86. [A] find [B] expose [C] uncover [D] discover

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