职称英语考试试题(2)

46. A

What will our home be like then?

47. E

The house of the future will have to grow and change with the family.

48. C

And the machine will tell us that food we will have to buy and how to cook it.

49. D

You will be able to change the color of the wall easily.

50. A

The only thing you won’t be able to do is move the house somewhere else!

第六部分：完形填空

Seeing Red Means Danger Ahead

The color red often means danger — and by paying attention,accidents can be prevented. In the future,the color red also may help __prevent__ (51) danger at construction sites. Thanks to new work by engineers,bridge supports( 桥梁支柱 ) — or __other__ (52) kinds of materials — could one day contain a color-changing material. It will turn red __before__ (53) a structure collapses or falls apart.

The secret __behind__ (54) the color-changing material is a particular type of molecule( 分子 ). A molecule is a group of atoms( 原子 ) held together by chemical bonds. Molecules come __in__ (55) all shapes and sizes,and make up __everything__ (56) you can see,touch or feel. How a molecule behaves depends on __what__ (57) kinds of atoms it contains,and how they're held together.

When a polymer containing a color-changing molecule called a mechanophore is about to break,it produces a __color__ (58). When a polymer with mechanophore molecules becomes "injured" or __weak__ (59),one of the mechanophore bonds __breaks__ (60) and the material turns red. "It's a really simple detection method," says Nancy Sottos,one of the scientists who worked on the project. Sottos and her team tested the color-changing polymers in their lab. The test __ results __ (61) proved encouraging.

There is a way to get rid of the red color: light. When a bright light is shone on the mechanophore,the broken bond is fixed — and the red color __disappears__ (62). This "self-healing" may be a problem for engineers. They need to use the color-changer in big construction projects that will be __outside__ (63),in sunlight. And sunlight will make the mechanophore's warning system __useless__ (64).

Sottos and her fellow scientists still have __a lot of__ (65) work to do before the color-changing molecules can be used outside the lab.

51.A throw B prevent C createD keep

52. A other B anotherC the other D others

53.A untilB althoughC after D before

54.A on B behind C underD down

55.A for B in C fromD at

56.A nothingB anyoneC someone D everything

57.A whyB how C what D where

58. A color B troubleC soundD time

59.A strongB soft C weak D hard

60.A closes B breaks C increasesD burns

61. A results B rules C toolsD methods

62.A repairsB controlsC finishes D disappears

63.A insideB beside C outside D above

64.A dangerous B useless C helpfulD important

65.A a part ofB a type of C a lot of D a pair of