C

It happened one morning 20 years ago. A British scientist Alec Jeffrey came across DNA fingerprinting: He identified the patterns of genetic material that are unique to almost every individual. His discovery changed everything from the way we do criminal investigations to the way we decide family law. But the professor of genetics at the University of Leicester, UK, is still surprised, and a bit worried, by the power of the technology he released upon the world.

The patterns within DNA are unique to each individual, except identical twins, who share the same pattern. The ability to identify these patterns has been used to convict(证明…有罪) murderers and to clear people who are wrongly accused. It is also used to identify the victims of war and settle disputes over who is the father of a child.

Jeffrey said he and his colleagues made the discovery by accident while tracking genetic

variations(变异). But, within six months of the discovery, genetic fingerprinting had been used in an immigration case, to prove that an African boy really was his parents’ son.·In 1986, it was used for the first time in a British criminal case: It cleared one suspect after being accused of two murders and helped convict another man.

DNA testing is now very common. In Britain, a national criminal database established in 1995 now contains 2.5 million DNA samples. The U.S. and Canada are developing similar systems. But there are fears about the stored DNA samples and how they could be used to harm a person’s privacy. That includes a person’s medical history, racial origin or psychological profile. “There is the long-term risk that people can get into these samples and start getting additional information about a person’s paternity(父子关系) or risk of disease,” Jeffrey said.

DNA testing is not an unfailing proof of identity. Still, it is considered a reasonably reliable system for determining the things it is used for. Jeffrey estimates the probability of two individuals’ DNA profiles matching in the most commonly used tests at one in a billion.

62. According to the text, DNA testing can NOT be used in _______ .

A. doing criminal investigations        B. deciding faraily law

C. clearmg wrongly accused people     D. telling twins apart

63. DNA samples are not popular with all the people because _______ .

A. the government in Britain establishes a criminal database

B. the US and Canada develop similar systems

C. DNA samples can be used to harm a person’s privacy

D. DNA testing is too expensive and dangerous now

64. Where will you most probably find this article?

A. In a guidebook.                   B. In a storybook.

C. In a science fiction.                D. In a scientific magazine.

65. Which is the best title for the passage?

A. Discovery of DNA testing by Jeffery  B. Practice of DNA testing in court

C. DNA testing in the present situation   D.Benefits and side effects of DNA testing

The idea of rain making is almost as old as man, but it was not until 1964 that man succeeded in making rain．In ancient times, rainmakers claimed to be able to bring rain by many methods: dancing, singing, killing various kinds of living creatures （including humans）, and blowing a stream of water into the air from a kind of pipe．

More recently, some rainmakers claimed to make rain by shooting guns, causing explosions, or burning chemical, the smoke of which was supposed to cause rain to fall．These rainmakers asked for as much as 1,000 dollars to make an inch of rain．One was so effective that he was almost hanged．He was believed to have caused a twenty-inch rain in southern California that flooded that land, killed several people, and did millions of dollars’ worth of damage．

Before 1946, rainmakers were either liars or honest people who have good luck．Scientific rain making was started in that year by Vincent J．Schaefer, a scientist at the laboratories of the General Electric Company in New York State． His success was the result of a lucky accident that changed years of failure into victory．

1．One rainmaker was almost hanged because _____．

A．he did not make rain at all                 B．he asked for too much money

C．he killed several people　                  D．people thought he caused too much rain

2．The underlined word liars means _____．

A．people who tell lies 　　　　              B．tools used to make rain

C．persons who make rain　　　　          D．people who have good luck

3．Which of the following methods can make rain?

　  A．Killing pigs and sheep．

　  B．Blowing a stream of water into the air from a kind of pipe．

　  C．Shooting guns or causing explosions．

　  D．None of the above is right．

4．Who was the first rainmaker succeeding in making rain?

　  A．The one who caused a twenty-inch rain in southern California．

　  B．Before 1946, a rainmaker who happened to have good luck．

　  C．Vincent J．Schaefer, in 1946．

　  D．The passage doesn’t tell us his or her name．

He has been called the “missing link”.Half-man, half-beast. He is supposed to live in the highest mountain in the world—Mount Everest.

He is known as the Abominable Snowman. The   1  of Snowman has been around for

  2  .?Climbers in the 1920s reported finding marks like those of human feet high up on the side of Mount Everest. The native people said they  3  this creature and called it the “Yeti”,and they said that they had   4  caught Yetis on two occasions   5  none has ever been produced as evidence.

Over the years, the story of the Yetis has  6  . In 1916, Eric Shipton took photographs of a set of tracks in the snow of Everest. Shipton believed that they were not   7  the tracks of a monkey or bear and   8  that the Abominable Snowman might really   9  .

Further efforts have been made to find out about Yetis. But the only things people have ever found were   10  footprints. Most believe the footprints are nothing more than   11  animal tracks, which had been made  12  as they melted and refroze in the snow.  13  ,in 1964,a Russian scientist said that the Abominable Snowman was   14  and was a remaining link with the prehistoric humans. But,?  15  ,?no evidence has ever   16  been produced.

These days, only a few people continue to take the story of Abominable Snowman  17  ,?but if they ever   18  catching one, they may face a real  19  : Would they put it in a   20  or give it a room in a hotel?

1.A.event                            B.story                         C.adventure                  D.description

2.A.centuries                B.too long                    C.some time                 D.many years

3.A.heard from             B.cared for                   C.knew of                    D.read about

4.A.even                      B.hardly                       C.certainly                    D.probably

5.A.as                          B.though                      C.when                        D.until

6.A.developed               B.changed                    C.occurred                    D.continued

7.A.entirely                  B.naturally                   C.clearly                      D.simply

8.A.found                     B.declared                    C.felt                           D.doubted

9.A.exist                      B.escape                       C.disappear                   D.return

10.A.clearer                  B.more                         C.possible                     D.rare

11.A.huge                     B.recent                      C.ordinary                    D.frightening

12.A.strange                 B.large                         C.deep                         D.rough

13.A.In the end             B.Therefore                  C.After all                    D.However

14.A.imagined                     B.real                           C.special                      D.familiar

15.A.so                        B.besides                      C.again                        D.instead

16.A.rightly                  B.actually                     C.normally                   D.particularly

17.A.lightly                  B.jokingly                    C.seriously                   D.properly

18.A.succeed in             B.insist on                    C.depend on                 D.join in

19.A.decision                B.situation                    C.subject                      D.problem

20.A.zoo                      B.mountain                   C.museum                    D.laboratory

He has been called the "missing link." Half-man, half-beast. He is supposed to live in the highest mountain in the world - Mount Everest.

　　 He is known as the Abominable Snowman. The___1___of the Snowman has been around for___2___. Climbers in the 1920s reported finding marks like those of human feet high up on the side of Mount Everest. The native people said they___3___ this creature and called it the "Yeti," and they said that they had___4___caught Yetis on two occasions___5___none has ever been produced as evidence (证据).

　　 Over the years, the story of the Yetis has___6___. In 1951, Eric Shipton took photographs of a set of tracks in the snow of Everest. Shipton believed that they were not ___7___the tracks of a monkey or bear and___8___that the Abominable Snowman might really___9___.

　　 Further efforts have been made to find out about Yetis. But the only things people have ever found were___10___footprints. Most believe the footprints are nothing more than___11___ animal tracks, which had been made___12___as they melted (融化) and refroze in the snow. ___13___, in 1964, a Russian scientist said that the Abominable Snowman was___14___and was a remaining link with the prehistoric humans. But, ___15___, no evidence has ever___16___been produced.

　　 These days, only a few people continue to take the story of the Abominable Snowman___17___. But if they ever___18___catching one, they may face a real___19 ___: Would they put it in a ___20___or give it a room in a hotel?

1. A. event　　　 　 B. story　　　　 C. adventure D. description　

2. A. centuries　 　　　 B. too long　　 C. some time　 　 D. many years

3. A. heard from　 B. cared for　 　 C. knew of　　 D. read about　

4. A. even　　　　 B. hardly　　 　 C. certainly　 D. probably　　　

5. A. as　　　　　 　 B. though　　　 C. when　　　 　 D. until　　　　　

6. A. developed 　　 B. changed　　 　 C. occurred　　 D. continued　　　

7. A. entirely　　 B. naturally　 　 C. clearly　　 D. simply　　　　

8. A. found　　　 　 B. declared　　 C. felt　　　 　 D. doubted　 　　

9. A. exist　　　　 B. escape　　 　 C. disappear　 D. return　　　　

10. A. clearer　　 B. more　　　　 　 C. possible　　 D. rare　　　　　　

11. A. huge　　　　 B. recent　　　 C. ordinary　　 D. frightening　　

12. A. strange　　 B. large　　　 　 C. deep　　　 　 D. rough　　　　

13. A. In the end　 B. Therefore　　 C. After all　　 D. However　　　

14. A. imagined　　 B. real　　　　 　 C. special　　 D. familiar　　　　

15. A. so　　　　 　 B. besides　　　 C. again　 　　 D. instead　　　　

16. A. rightly　　　 　 B. actually　　 C. normally　　 D. particularly　　

17. A. lightly　　　 　 B. jokingly　　 C. seriously　　 D. properly　　　

18. A. succeed in　 B. insist on　　 C. depend on D. join in　　　 　

19. A. decision　　 B. situation　　 C. subject　　　 D. problem　　　

20. A. zoo　　　　　 B. mountain　　 C. museum　　 　 D. laboratory

He has been called the “missing link”. Half-man, half beast. He is supposed to live in the highest mountain in the world—Mount Everest.

    He is known as the Abominable Snowman. The ___1__ of Snowman has been around for ___2__ Climbers in the1920s reported finding marks like those of human feet high up on the side of Mount Everest.  The native people said they ___3__ this creature and called it the “Yeti”, and they said that they had ___4__ caught Yetis on two occasions ___5__ none has ever been produced as evidence (证据).

    Over the years, the story of the Yetis has ___6__. In1951, Eric Ship ton took photographs of a set of tracks in the snow of Everest. Ship ton believed that they were not ___7__ the tracks of a monkey or bear and ___8__ that the Abominable Snowman might really ___9__.

    Further efforts have been made to find out about Yetis. But the only things people have ever found were ___10__ foot prints. Most believe the footprints are nothing more than ___11__ animal tracks, which had been made ___12__ as they melted (融化) and refroze in the snow. ___13__, in 1964, a Russian scientist said that the Abominable Snowman was ___14__ and was a remaining link with the prehistoric humans. But, ___15__, no evidence has ever ___16__ been produced.

    These days, only a few people continue to take the story of the Abominable Snowman ___17__ but if they ever ___18__ catching one, they may face a real ___19__: Would they put it in a ___20__ or give it a room in a hotel?

1.

A．event

B．story

C．adventure

D．description

2.

A．centuries

B．too-long

C．some time

D．many years

3.

A．heard from

B．cared for

C．knew of

D．read about

4.

A．even

B．hardly

C．certainly

D．probably

5.

A．as

B．though

C．when

D．until

6.

A．developed

B．changed

C．occurred

D．continued

7.

A．entirely

B．naturally

C．clearly

D．simply

8.

A．found

B．declared

C．felt

D．doubted

9.

A．exist

B．escape

C．disappear

D．return

10.

A．clearer

B．more

C．possible

D．rare

11.

A．huge

B．recent

C．ordinary

D．frightening

12.

A．strange

B．large

C．deep

D．rough

13.

A．In the end

B．Therefore

C．After all

D．However

14.

A．imagined

B．real

C．special

D．familiar

15.

A．so

B．besides

C．again

D．instead

16.

A．right

B．actually

C．normally

D．particularly

17.

A．lightly

B．jokingly

C．seriously

D．properly

18.

A．succeed in

B．insist on

C．depend on

D．join in

19.

A．decision

B．situation

C．subject

D．problem

20.

A．zoo

B．mountain

C．museum

D．laboratory