In recent years a new farming revolution has begun，one that involves the 61 of life at a fundamental level—the gene. The study of genetics has 62 a new industry called biotechnology. As the name suggest，it 63 biology and modern technology through such techniques as genetic engineering. Some of the new biotech companies specialize in agriculture and are working feverishly to 64 seeds that give a high yield，that 65 diseases，drought and frost，and that reduce the need for 66 chemicals. If such goals could be achieved，it would be most 67 . But some have raised concerns about genetically engineered crops.

In nature，genetic diversity is created within certain 68 . A rose can be crossed with a different kind of rose，but a rose will never cross with a potato. Genetic engineering， 69 usually involves taking genes from one species and inserting them into another 70 to transfer a desired characteristic. This could mean，for example，selecting a gene which leads to the production of a chemical with anti-freeze 71 from an artic fish，and inserting it into a potato or strawberry to make it frost-resistant. 72 ，then，biotechnology allows humans to

73 the genetic walls that separate species.

Like the green revolution， 74 some call the gene revolution contributes to the problem of genetic uniformity—some say even more so 75 geneticists can employ techniques such as cloning and 76 culture(培養)，processes that produce perfectly 77 copies. Concerns about the erosion of biodiversity，therefore，remain. Genetically altered plants，however，raise new 78 ，such as the effects that they may have on us and the environment.“We are flying blindly into a new 79 of agricultural biotechnology with high hopes，few constraints，and little idea of the potential 80 ，”said science writer Jeremy Rifkin.

61.

A. manufacture

B. management

C. manipulation

D. maturity

62.

A. got along with

B. lived up to

C. come up with

D.given rise to

63.

A. blends

B. breeds

C. broods

D. blasts

64.

A. hatch

B. patent

C. duplicate

D. train

65.

A. restrict

B. retrieve

C. reverse

D. resist

66.

A. hazardous

B. hydraulic

C. hostile

D. harmless

67.

A. surprising

B. disappointing

C. beneficial

D. extreme

68.

A. lines

B. ages

C. space

D. limits

69.

A. after all

B. on the other hand

C. in any case

D. as a result

70.

A. in an attempt B. in no case

C. to the point

D. with regard

71.

A. quality

B. quantity C. priority

D. property

72.

A. In advance

B. In part

C. In essence

D. In return

73.

A. breach

B. blaze

C. brake

D. brand

74.

A. where

B. as

C. what

D. so

75.

A. that

B. because

C. if

D. when

76.

A. skin

B. muscle

C. organ

D. tissue

77.

A. resembling

B. identical

C. similar

D. alike

78.

A. difficulties

B. height

C. issues

D. goals

79.

A. spot

B. scheme

C. deadline

D. era

80.

A. outcomes

B. mystery

C. navigation

D. destination

　　答案解析在下一頁。。。

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