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DNA is a nucleic acid that contains genetic instructions used in development and functioning of all known living organisms and some viruses.

A．/; a B．the; the C．the; / D．/; /

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　　Nowadays more and more people are talking about genetically modified foods(GM foods)．GM foods develop from genetically modified organisms(有机体), which have had specific changes introduced into their DNA by genetic engineering techniques．These techniques are much more precise where an organis m is exposed to chemicals to create a non-specific but stable change．For many people, the high-tech production raises all kinds of environmental, ethical(伦理的), health and safety problems．Particularly in countries with long farming traditions, the idea seems against nature．

　　In fact, GM foods are already very much a part of our lives．They were first put on the market in 1996．A third of the corn and more than half the cotton grown in the U．S．last year was the product of biotechnology, according to the Department of Agriculture．More than 65 million acres of genetically modified crops will be planted in the U．S．this year．The genetic genie is out of the bottle．

　　However, like any new product entering the food chain, GM foods must be subjected to careful testing．In wealthy countries, the debate about biotech is not so fierce by the fact that they have a large number of foods to choose from, and a supply that goes beyond the needs．In developing countries desperate to feed fast-growing and underfed populations, the matter is simpler and much more urgent：do the benefits of biotech outweigh the risks?

　　The statistics on population growth and hunger are disturbing．Last year the world ' s population reached 6 billion．The U．N．states that nearly 800 million people around the world are unhealthy．About 400 million women of childbearing age don' t have enough iron, which means their babies are exposed to various birth defeats．As many as 100 million children suffer from vitamin A deficiency, a leading cause of blindness．

　　How can biotech help? Genetic engineering is widely used to produce plants and animals with better nutritional values．Biotechnologists have developed genetically modified rice and they are working on other kinds of nutritionally improved crops．Biotech can also improve farming productivity in places where food shortages are caused by prop damage attributable to drought, poor soil and crop viruses．

(1)

The passage mainly talks about ________．
[　　]
A．	the world' s food problem
B．	the development in biotech
C．	the genetically modified foods
D．	the way to solve food shortages

(2)

According to the passage, GM foods ________．
[　　]
A．	will replace naturally grown foods
B．	are far better than naturally grown foods
C．	may help to solve the problem of poor nutrition
D．	can cause serious trouble in developing countries

(3)

The underlined sentence "The genetic genie is out of the bottle．" in Paragraph 2 probably means that ________．
[　　]
A．	GM foods are available everywhere
B．	the technology in producing GM foods is advanced
C．	genetic technology may have uncontrollable powers
D．	genetic technology has come out of laboratories into markets

(4)

What' s the writer' s attitude towards GM foods?
[　　]
A．	Enthusiastic．
B．	Cautious．
C．	Disapproving．
D．	Unbelievable．

Have you ever imagined that you could be cloned(克隆) like Dolly, the sheep, in the not too distant future?
The news that a human embryo(胚胎) has been 16 cloned for the first time has caused mixed reactions(反应).
The   17 was carried out by scientists from the Advanced Cell Technology Inc(ACT), in Massachusetts, US. The group 18 the news on November 25.
This is 19 human being. A clone is alive, it walks, it breathes, said Jamie Grifo, a(n) 20 on the study of cloning at New York University School of Medicine.
“This is a set of cells in a lab that will be used to 21  someone’s life.”
Such research could lead to treatment for 22 such as heart disease, AIDS and even cancer, 23  scientists.
Despite high hopes from other scientists, the news raised concerns immediately from religious and political leaders. Several 24 in the US do not allow human cloning. President George W. Bush also made it clear that he is 25 any type of human cloning. However, the scientists at ACT said they have no interest at present in 26 an early embryo into 27 .
Animal have been cloned repeatedly since Dolly, the sheep 28 in 1997. And there were no real technical 29 to stand in the way of scientists making a cloned human embryo.
This time the research group used traditional cloning technology with a human 30 .  31 it was given DNA from an adult cell, the egg began to 32 .  33 it was stopped from becoming a baby-at a stage in which it was 34 a ball of cells. The 35 technology has been used to clone sheep , cattle and monkeys.

Have you ever imagined that you could be cloned(克隆) like Dolly, the sheep, in the not too distant future?

The news that a human embryo(胚胎) has been 16 cloned for the first time has caused mixed reactions(反应).

The 17 was carried out by scientists from the Advanced Cell Technology Inc(ACT), in Massachusetts, US. The group 18 the news on November 25.

This is 19 human being. A clone is alive, it walks, it breathes, said Jamie Grifo, a(n) 20 on the study of cloning at New York University School of Medicine.

“This is a set of cells in a lab that will be used to 21 someone’s life.”

Such research could lead to treatment for 22 such as heart disease, AIDS and even cancer, 23 scientists.

Despite high hopes from other scientists, the news raised concerns immediately from religious and political leaders. Several 24 in the US do not allow human cloning. President George W. Bush also made it clear that he is 25 any type of human cloning. However, the scientists at ACT said they have no interest at present in 26 an early embryo into 27 .

Animal have been cloned repeatedly since Dolly, the sheep 28 in 1997. And there were no real technical 29 to stand in the way of scientists making a cloned human embryo.

This time the research group used traditional cloning technology with a human 30 . 31 it was given DNA from an adult cell, the egg began to 32 . 33 it was stopped from becoming a baby-at a stage in which it was 34 a ball of cells. The 35 technology has been used to clone sheep , cattle and monkeys.

1. A. in failure B. never C. successfully D. not

2.A. research B. report C. works D. task

3. A. made known B. made C. said D. had

4.A. a cloned B. a man-made C. a D. not a cloned

5.A. worker B. head C. expert D. assistant

6.A. save B. rescue C. cure D. treat

7. A. patients B. health C. diseases D. things

8.A. according to B. including C. besides D. argued

9.A. countries B. nations C. peoples D. states

10.A. for B. against C. researching for D. praising

11. A. developing B. building C. inventing D. discovering

12. A. a baby B. a man C. a woman D. a white man

13.A. died B. appeared C. turned up D. was no more

14. A. questions B. affairs C. business D. problems

15.A. egg B. bless C. meat D. cell

16.A. Before B. After C. While D. And

17.A. grow B. die C. change D. grow up

18.A. And B. But C. However D. Yet

19.A. yet B. still C. not D. /

20. A. different B. usual C. ordinary D. same

Have you ever imagined that you could be cloned(克隆) like Dolly, the sheep, in the not too distant future?
The news that a human embryo(胚胎) has been1cloned for the first time has caused mixed reactions(反应).
The2was carried out by scientists from the Advanced Cell Technology Inc(ACT), in Massachusetts, US. The group3the news on November 25.
This is4human being. A clone is alive, it walks, it breathes, said Jamie Grifo, a(n)5on the study of cloning at New York University School of Medicine.
“This is a set of cells in a lab that will be used to6someone’s life.”
Such research could lead to treatment for 7such as heart disease, AIDS and even cancer,8scientists.
Despite high hopes from other scientists, the news raised concerns immediately from religious and political leaders. Several 9 in the US do not allow human cloning. President George W. Bush also made it clear that he is 10any type of human cloning. However, the scientists at ACT said they have no interest at present in11an early embryo into 12.
Animal have been cloned repeatedly since Dolly, the sheep 13 in 1997. And there were no real technical 14to stand in the way of scientists making a cloned human embryo.
This time the research group used traditional cloning technology with a human 15.16it was given DNA from an adult cell, the egg began to 17.18it was stopped from becoming a baby-at a stage in which it was19a ball of cells. The20 technology has been used to clone sheep , cattle and monkeys.

1.
1. A.
  in failure
2. B.
  never
3. C.
  successfully
4. D.
  not
2.
1. A.
  research
2. B.
  report
3. C.
  works
4. D.
  task
3.
1. A.
  made known
2. B.
  made
3. C.
  said
4. D.
  had
4.
1. A.
  a cloned
2. B.
  a man-made
3. C.
  a
4. D.
  not a cloned
5.
1. A.
  worker
2. B.
  head
3. C.
  expert
4. D.
  assistant
6.
1. A.
  save
2. B.
  rescue
3. C.
  cure
4. D.
  treat
7.
1. A.
  patients
2. B.
  health
3. C.
  diseases
4. D.
  things
8.
1. A.
  according to
2. B.
  including
3. C.
  besides
4. D.
  argued
9.
1. A.
  countries
2. B.
  nations
3. C.
  peoples
4. D.
  states
10.
1. A.
  for
2. B.
  against
3. C.
  researching for
4. D.
  praising
11.
1. A.
  developing
2. B.
  building
3. C.
  inventing
4. D.
  discovering
12.
1. A.
  a baby
2. B.
  a man
3. C.
  a woman
4. D.
  a white man
13.
1. A.
  died
2. B.
  appeared
3. C.
  turned up
4. D.
  was no more
14.
1. A.
  questions
2. B.
  affairs
3. C.
  business
4. D.
  problems
15.
1. A.
  egg
2. B.
  bless
3. C.
  meat
4. D.
  cell
16.
1. A.
  Before
2. B.
  After
3. C.
  While
4. D.
  And
17.
1. A.
  grow
2. B.
  die
3. C.
  change
4. D.
  grow up
18.
1. A.
  And
2. B.
  But
3. C.
  However
4. D.
  Yet
19.
1. A.
  yet
2. B.
  still
3. C.
  not
4. D.
  /
20.
1. A.
  different
2. B.
  usual
3. C.
  ordinary
4. D.
  same

　　　 Steve Jobs, the former chief executive of Apple, announced his resignation as head of Apple on Aug．24, 2011．The following is the letter from Steve Jobs to the Apple board．

　　　 To the Apple Board of Directors and the Apple Community:

　　　 I have always said if there ever came a day when I could no longer meet my duties and expectations as Apple’s CEO, I would be the first to let you know．Unfortunately, that day has come．

　　　 I hereby resign as CEO of Apple．I would like to serve, if the Board sees fit, as Chairman of the Board, director and Apple employee．

　　　 As far as my successor（继任者）goes, I strongly recommend that we execute（执行）our succession plan and name Tim Cook as CEO of Apple．

　　　 I believe Apple’s brightest and most innovative（创意改革的）days are ahead of it．And I look forward to watching and contributing to its success in a new role．

　　　 I have made some of the best friends of my life at Apple, and I thank you all for the many years of being able to work alongside you．

　　　 Steve

　　　 Tim Cook, the newly appointed CEO of Apple, sent an email to the troops after Steve Jobs stepped down．Below is the full text of the email．

Team:

　　　 I am looking forward to the amazing opportunity of serving as CEO of the most innovative company in the world．Joining Apple was the best decision I’ve ever made and it’s been the privilege of a lifetime to work for Apple and Steve for over 13 years．I share Steve’s optimism for Apple’s bright future．

　　　 Steve has been an incredible leader and mentor to me, as well as to the entire executive team and our amazing employees．We are really looking forward to Steve’s ongoing guidance and inspiration as our Chairman．

　　　 I want you to be confident that Apple is not going to change．I cherish and celebrate Apple’s unique principles and values．Steve built a company and culture that is unlike any other in the world and we are going to stay true to that — it is in our DNA．We are going to continue to make the best products in the world that delight our customers and make our employees incredibly proud of what they do．

　　　 I love Apple and I am looking forward to diving into my new role．All of the incredible support from the Board, the executive team and many of you has been inspiring．I am confident our best years lie ahead of us and that together we will continue to make Apple the magical place that it is．

Tim

　　　 Cook, 50, once served in IBM and Compaq before he joined Apple in 1998．He was promoted to the chief operating officer in 2007 and has been the real CEO responsible for most of Apple’s day-to-day operations during Job’s medical leaves．

It’s believed that the replacement will not affect Apple’s business at least in short term, but it is unclear whether Apple’s innovation and operational efficiencies will continue unabated．

41．Which of the following is conveyed in Steve Jobs’ letter to the Apple board?

　　　 A．He announced his resignation and the Apple’s succession plan．

　　　 B．He recalled his best years of working alongside his best friends at Apple．

　　　 C．He expressed his expectation of Apple’s new successor Tim Cook．

　　　 D．He showed his regret for being unable to meet his duties as CEO．

42．What message does Cook mainly intend to communicate in his email to the team?

　　　 A．Joining Apple is a best decision． B．Unique guidance makes Apple a success．

　　　 C．Apple isn’t going to change． D．Optimism brings Apple a bright future．

43．It can be inferred from the passage that 　　　　　．

　　　 A．Cook has been in charge of Apple’s daily operations since 2007

　　　 B．Cook is proud of his promotion and regards it as a lifetime honor

　　　 C．Steve Jobs refused to provide ongoing guidance because of his health problem

　　　 D．Steve Jobs and Tim Cook share the same belief in Apple’s future

44．According to Tim Cook, what makes Apple the magical place that it is?

　　　 A．Apple’s unique culture, principles and values．

　　　 B．Apple’s best quality products in the world．

　　　 C．Apple’s successful sales promotion strategies．

　　　 D．Apple’s great efforts to satisfy its employees．

45．The public seem to take a（n）　　　　　 attitude towards Apple’s future in the long run．

　　　 A．supportive 　　　　　　 B．uncertain 　　　　　　　 C．pessimistic 　　　　　 D．optimistic

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