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第六部分：完型填空(第51～65题，每题1分，共15分)

阅读下面的短文，文中有15处空白，每处空白给出了4个选项，请根据短文的内容从4个选项中选择1个最佳答案，涂在答题卡相应的位置上。

Wonder Webs

Spider webs are more than homes, and they are ingenious traps. And the world's best webspinner may be the Goldern Orb Weaver spider. The female Orb Weaver spins a web of fibers thin enough to be invisible to insect prey, yet 51 enough to snare a flying bird without breaking.

The secret of the web's strength? A type of super-resilient 52 called dragline. When the female spider is ready to 53 the web's spokes and frame, she uses her legs to draw the airy thread out through a hollow nozzle in her belly. Dragline is not sticky, so the spider can race back and forth along 54 to spin the web's trademark spiral.

Unlike some spiders that weave a new web every day, a Golden Orb Weaver 55 her handiwork until it falls apart, sometimes not for two yearsl. The silky thread is five times stronger than steel by weight and absorbs the force of an impact three times better than Kevlar, a high-strength human-made 56 used in bullet-proof vests. And thanks to its high tensile strength, or the ability to resist breaking under the pulling force called tension, a single strand can stretch up to 40 percent longer than its original 57 and snap back as well as well as new. No human-made fiber even comes 58

It is no 59 manufacturers are clamoring for spider silk. In the consumer pipeline: high-performance fabrics for athletes and stockings that never run. Think parachute cords and suspension bridge cables. A steady 60 of spider silk would be worth billions of dollars-but how to produce it? Harvesting silk on spider farms does not 61 because the territorial arthropods have a tendency to devour their neighbors.

Now, scientists at the biotechnology Nexia are apinning artificial silk modeled after Goldern orb dragline. The 62 step: extract silk-making genes from the spiders. Next, implant the genes into goat egg cells. The nanny goats that grown from the eggs secrete dragline silk proteins in their 63 "The young goats pass on the silk-making gene without 64 help from us," says Nexia president Jeffrey Turner. Nexia is still perfecting the spinning process, but they hope artificial spider silk will soon be snagging customers 65 the real thing snags bugs.

51

A　tough

B　soft

C　large

D　smooth

52

A　cloth

B　silk

C　nylon

D　wool

53

A　repair

B　pull

C　move

D　weave

54

A　him

B　her

C　it

D　those

55

A　refixes

B　reproduces

C　remakes

D　reuses

56

A　metal

B　mass

C　material

D　model

57

A　bredth

B　length

C　height

D　strength

58

A　close

B　well

C　open

D　awake

59

A　hurry

B　worry

C　wonder

D　use

60

A　shipment

B　supply

C　run

D　exchange

61

A　run

B　go

C　deal

D　work

62

A　previous

B　foremost

C　first

D　front

63

A　milk

B　meat

C　lungs

D　muscle

64

A　no

B　any

C　some

D　many

65

A　as fast as

B　as gently as

C　as fully as

D　as little as

参考答案：

51　A flying bird飞入蜘蛛网时有股冲力，网线坚韧才能捕捉到它，所以选tough。本句中的without breaking 也指示选tough。

52　B英语中蜘蛛网丝是spider silk。见第三、第四段分别出现的silky thread和spider silk。

53　D本句说蜘蛛织网的机制和过程，所以选weave。而且，这种蜘蛛就叫Golden Orb Weaver。

54　C从上下文判断，alon9之后接的是the dragline，其代词应为it。

55　D本句说Golden Orb Weaver与某些种类的蜘蛛不同，它不用每天织新网，只要网不破，就能一直使用下去，有时一用2年，所以选reuses。

56　C本句将Golden Orb Weaver蜘蛛网的牢度和张度与防弹衣Kevlar材料对比，说明该蜘蛛网坚韧的程度。填入的词应该是Kevlar的同位语，Kevlar是一种材料，所以选material。

57　B除了上下文的意思要求填length之外，本句中的用词stretch和longer都指示要用 length。

58　A come后面可接形容词。come close意为“接近”。come well，come open，come awake都能搭配，但意思与上下文不符。

59　C It is no wonder(that)是“不足为奇，十分自然”的意思。只有选wonder意思才连贯。

60　B从意义上判断，a steady supply是正确的选择。shipment(运送)、run(运转)或exchange(交换)的意思与上下文配不上。

61　D上下文的意思要求用“起作用”这个词，work在本句的词义是“起作用”。

62　C下一句是以next开始的。有next，前面很可能有first之类表次序的词。

63　A常识告诉我们，把dragline silk proteins分泌在milk里，才容易分离出来，所以选meat、lungs或muscle都是不合常理的。

64　B在without之后要用any，一般不用some。英语不说without no…，而many不能修饰help。

65　A本题只能选as fast as。若选B、C或D，意思与上下文不符。

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