考博英语完型填空三.docx

1、考博英语完型填空三考博英语-完型填空(三)(总分：30.00，做题时间：90分钟)一、Passage 1Directions: There are 20 blanks in the following passage. For each blank there are four choices marked A, B, C and D. Choose the best answer for each blank .(总题数：1，分数：10.00)There is probably no sound in (1) more chilling than the hiss of a diamondb

2、ack rattlesnake. There is good reason: the western diamondback has killed more humans than (2) snake. It is easily excitable, very aggressive, frequently hungry, and deadly poisonous. Yet it doesnt really hiss. Rather, it (3) its tail. A mature rattler can move its tail up and down between fifty and

3、 a hundred times a second! The hollow rattles (4) the tail, beating against each other, create the hissing sound.Why does this creature (5) rattles? Rattlesnakes molt three times a year, shedding their outer layer of skin each time. But the molting skin near the tail is not discarded. (6) it hardens

4、 and hollows out, becoming another rattle. If a snake had never lost any rattles, you could (7) its age by counting them and dividing by three.Do the snakes need their rattles? The rattles cannot be used in a mating call, (8) rattlesnakes are deaf. They are not a sign of hunger, for snakes with full

5、 stomachs rattle as often as hungry (9) . And in the wild, the rattling scares prey. It does not (10) them. Therefore, scientists believe that snakes use rattles merely to warn larger animals not to step on (11) . They have studied them extensively and found that it was a function more important in

6、ages past when the rattlers shared the plains (12) 60 million buffalo!Rattlesnakes are one of the (13) advanced forms of pit vipersanimals who possess an organ for an extra sense. The pit organ is like an infrared radar sensor. (14) in the snakes head, the pit organ can sense differences in temperat

7、ure between inside and outside itselfdifferences as small as 1% of a degree. Not only can rattlesnakes (15) sense the presence of another animalor a humanbut they apparently can (16) determine its direction and range. These animals dont feed on (17) , of course. Their poison, however, may kill human

8、s. But this happens only in (18) they think is self-defense.Rattlesnakes are really quite (19) Their principal diet of mice and rats makes them valuable to the ecology of the West. So rather than fear them, we should respect the (20) they play in containing the population of these harmful pests.（分数：

9、10.00）(1).A. person B. natureC. forest D. zoo（分数：0.50）A.B.C.D.解析：根据句意可推测，该句表达在自然界中菱斑响尾蛇的“嘶嘶声”是最可怕的，故选B项。A项不符合语境，C项与D项虽也为环境范围但不符合语意。(2).A. anyB. otherC. moreD. any other（分数：0.50）A.B.C.D.解析：该句意为在西方菱斑响尾蛇杀死的人类比其他蛇类杀死的人还要多，用any other表示同为蛇类的不同蛇种，故选D。A项any只用于不同类的比较，B项搭配snake应为复数，C项搭配错误。(3).A. twists B. cle

10、ansC. sheds D. shakes（分数：0.50）A.B.C.D.解析：根据文意可知响尾蛇尾巴上下弯曲，故选A。(4).A. at B. inC. on D. by（分数：0.50）A.B.C.D.解析：该句表示“在尾巴上发出响声”，用介词on，A项与B项介词的方位错误，故选C。(5).A. attractB. possessC. graspD. transfer（分数：0.50）A.B.C.D.解析：该句意为“为什么这种生物有这样的响器呢”，故选B。possess，表“拥有”。(6).A. On timeB. At timeC. In a timeD. In time（分数：0.5

11、0）A.B.C.D.解析：该句意为“经过一段时间以后，它会变硬并挖空”，选C。In a time表示“经过一段时间”。(7).A. tell B. speakC. talk D. ask（分数：0.50）A.B.C.D.解析：四个选项中只有A项tell有“识别；分辨；判断出”的意思，故选A。(8).A. because of B. due toC. for D. so（分数：0.50）A.B.C.D.解析：该句表原因，故排除D项，A项because of和B项due to后面只能接名词或名词短语，只有C项for后面能跟句子表原因，故选C。(9).A. one B. onesC. these D

12、. those（分数：0.50）A.B.C.D.解析：该句主语snakes是复数形式，故代词也用复数ones，而此处不是特别指代“这些”或“那些”，排除C、D，故选B。(10).A. control B. avoidC. repel D. attack（分数：0.50）A.B.C.D.解析：该句表达的是，响尾蛇只是恐吓捕食者，而非真正攻击他们，故选D项attack。(11).A. them B. itC. you D. rattle（分数：0.50）A.B.C.D.解析：该句表示响尾蛇只是警告大型动物不要踩到它们，故选A选项them表示“它们自己”。(12).A. together B. by

13、C. with D. through（分数：0.50）A.B.C.D.解析：share with为固定搭配，意为“与分享”，故选C。(13).A. more B. mostC. much D. many（分数：0.50）A.B.C.D.解析：该句表示响尾蛇是最高级的蛇种之一，用搭配one of the most.表示，故选B。(14).A. To locateB. LocatingC. Being locatedD. Located（分数：0.50）A.B.C.D.解析：过去分词在句首作定语，选D。(15).A. therefore B. becauseC. since D. though（分

14、数：0.50）A.B.C.D.解析：该句表示响尾蛇因此能感知其他动物或人类的存在，故选A项therefore，B项和C项表因为而非表示因此，后需接原因，故排除，D选项不符合句意。(16).A. slowly B. poorlyC. instantly D. happily（分数：0.50）A.B.C.D.解析：根据前句意思，该句表达响尾蛇能立即判断其他动物的方位和距离，故选C选项。(17).A. monkeys B. peopleC. mice D. seagulls（分数：0.50）A.B.C.D.解析：根据后句“然而它们的毒性可能杀死人类”可推断前句句意为“它们并不以人类为食”，故选B项。

15、(18).A. which B. thatC. how D. what（分数：0.50）A.B.C.D.解析：what作they think的宾语，in what在这里等同于which，故选D。(19).A. helpfulB. handsomeC. poisonousD. scarce（分数：0.50）A.B.C.D.解析：通过“响尾蛇主食鼠类维持了西部生态平衡”可知它们非常有益，故选A。(20).A. fear B. defenseC. role D. sense（分数：0.50）A.B.C.D.解析：该句表示“我们应该尊重响尾蛇扮演的角色”，play the role为固定搭配，故选C。

16、二、Passage 2Directions: There are 20 blanks in the following passage. For each blank there are four choices marked A, B, C and D. Choose the best answer for each blank .(总题数：1，分数：10.00)Sulphur is one of the oldest, cheapest, and most useful minerals in the world. Yellowish or greenish in (1) , this o

17、dorless material is found in the earth in a crystal form. We have discovered thousands of (2) for it. For this reason, every man, woman, and child in America (3) about seventy-five pounds of it each year.Until 1900 almost all of the worlds supply of sulphur came from the Italian (4) of Sicily. Since

18、 then America has discovered how to mine its own vast supplies found in Texas and Louisiana. Spain, Mexico, and South America are also (5) for it. (6) , we know there are trillions of tons of sulphur in our oceans.In Sicily sulphur was found near the earths surface, but American miners had to learn

19、(7) to extract sulphur from 1200 to 1500 feet underground. There were many years of experiments. Then they finally found the (8) . Several pipes were drilled down to the sulphur deposits. Some of them carried boiling water, causing the sulphur to (9) . Then other pipes carried the mineral up and (10

20、) of the earth in a liquid form.Most people do not realize that the manufacture of many common articles (11) on sulphur. Some farmers use compounds of this mineral to (12) insects and plant pests. It is an important ingredient in the manufacture of paper pulp, (13) is used for our books and magazine

21、s. Researchers have found that some forms of sulphur can be used in fighting infections. Therefore many (14) include this mineral. Gunpowder, camera and X-ray film, and mbber tires also (15) sulphur.About eighty percent of all the sulphur (16) goes into the manufacture of sulphurie acid. In its pure

22、 form it has no (17) . However, sulphide compounds (18) have the strong smell of rotten eggs. Although most sulphurie acid is used to make fertilizers and to refine petroleum, it is an ingredient in hundreds of other commodities (19) , from textiles to glue, food preservatives, paint, and (20) glass

23、.（分数：10.00）(1).A. form B. smellC. use D. colour（分数：0.50）A.B.C.D.解析：由yellowish和greenish可知表达颜色，故选D项colour。(2).A. namesB. purposesC. institutesD. formulas（分数：0.50）A.B.C.D.解析：该句句意为“我们发现了它的千百种用途”，故用purposes，选B。(3).A. uses B. useC. used D. will use（分数：0.50）A.B.C.D.解析：该句用一般现在时陈述事实，因主语是ever man，woman.故动词用单数

24、，故选A。(4).A. place B. cityC. island D. state（分数：0.50）A.B.C.D.解析：该句句意为“至1900年世界上所有的硫磺供给都来自于意大利的西西里岛”，故选C项island。(5).A. waitingB. votingC. preparingD. digging（分数：0.50）A.B.C.D.解析：该句句意为“西班牙、墨西哥、南美也挖掘硫磺”，故用digging，故选D。(6).A. As a resultB. In additionC. Except forD. As well（分数：0.50）A.B.C.D.解析：由于前句在大陆范围挖掘硫磺

25、，而该句表明在海洋也挖掘大量硫磺，根据句子关系可知用in addition，故选B。(7).A. how B. whatC. why D. when（分数：0.50）A.B.C.D.解析：该句意为美洲矿工必须学会如何从12001500英尺的地下提取硫磺，故选A项how。(8).A. problem B. goldC. silver D. location（分数：0.50）A.B.C.D.解析：该句意为他们最终找到了硫磺的位置，故选D项location。(9).A. freeze B. combineC. melt D. hide（分数：0.50）A.B.C.D.解析：由前句“其中一些管道运输沸

26、水”，可知后句应为“导致硫磺融化”，故选C。(10).A. from B. outC. by D. beneath（分数：0.50）A.B.C.D.解析：该句意为“将这些矿物从土地中运输出来”，所以用out，故选B。(11).A. depends B. floatsC. lives D. works（分数：0.50）A.B.C.D.解析：该句意为“大部分人都不知道很多普通用品的制造都取决于硫磺”，故选A，B选项、C选项、D选项不符合文意。(12).A. increase B. helpC. grow D. kill（分数：0.50）A.B.C.D.解析：根据该句的宾语是“昆虫和植物害虫”，可推

27、断用kill，表明杀死害虫，故选D。(13).A. that B. whoC. which D. when（分数：0.50）A.B.C.D.解析：该句为非限定性定语从句，故用which，选C。(14).A. plasticsB. medicinesC. ornamentsD. furnishings（分数：0.50）A.B.C.D.解析：从前句可知这种矿物可以对抗感染，可推断该句应是许多药物包含了这种矿物，故选B。(15).A. include B. excludeC. confuse D. disappear（分数：0.50）A.B.C.D.解析：由上下文可知是“火药、相机、X光胶片、橡胶轮

28、胎都包含硫磺”，所以选A，B为“不包括在内”，不符合文意，C、D不符合句意。(16).A. to mine B. miningC. mines D. mined（分数：0.50）A.B.C.D.解析：该句此处意为“开采的硫磺”，用过去分词作定语，故选D。(17).A. dirt B. eolourC. odour D. buyer（分数：0.50）A.B.C.D.解析：根据后句，可推测该句意思为“在它的纯形态时它是无味的”，故选C。(18).A. did B. doC. has D. will（分数：0.50）A.B.C.D.解析：该句动词前加do，为强调形式。(19).A. as well

29、B. eitherC. also D. as well as（分数：0.50）A.B.C.D.解析：该句话表达硫磺是很多物品的原材料，是并列关系，故选A，B项either表达的是否定句的“也”，C项用法错误，D项在此处意思不符。(20).A. so B. orC. as D. even（分数：0.50）A.B.C.D.解析：该句意为“甚至是玻璃”，故用even，选D。A项后面须接结果，B项不能和and连用，C项语意不通。三、Passage 3Directions: There are 20 blanks in the following passage. For each blank ther

30、e are four choices marked A, B, C and D. Choose the best answer for each blank .(总题数：1，分数：10.00)This large city does almost no manufacturing and very little wholesale trade. Yet without the important service (1) provides, business everywhere would quickly grind to a (2) . Chaos would reign in all other leading cities. As you have guessed, the product we are talking about is gover