B The fiddler crab (蟹) is a living clock. It indicates the time of day by the co

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B
The fiddler crab (蟹) is a living clock. It indicates the time of day by the colour of its skin, which is dark by day and pale by night. The crab’s changing colour follows a regular twenty-four hour plan that exactly matches the daily rhythm of the sun.
Does the crab actually keep time, or does its skin simply answer to the sun’s rays, changing colour according to the amount of light which strikes it? To find out, biologists kept crabs in a dark room for two months. Even without daylight, the crab’s skin colour continued to change exactly on time.
This characteristic probably developed gradually in answer to the daily rising and setting of the sun, to help protect the crab from sunlight and enemies. After millions of years it has become completely controlled inside the living body of the crab.
The biologists noticed that once each day the colour of the fiddler crab is especially dark, and that each day this happens fifty minutes later than on the day before. From this they discovered that each crab follows not only the rhythm of the sun but also that of the tides (潮水). The crab’s period of greatest darkening is exactly the time of low tide on the beach where it was caught!
40. The crab’s changing colour _______.
A. tells the crab what time it is
B. protects the crab from the sunlight and enemies
C. keeps the crab warm
D. is of no real use
41. When the fiddler crabs were kept in the dark, they _______.
A. did not change colour          B. changed colour more quickly
C. changed colour more slowly     D. changed colour on the same timetable
42. The crab’s colour—changing ability was probably developed _______.
A. in the process of evolution (进化)   B. over millions of years
C. by the work of biologists          D. both A and B

43. The best title for this selection would be _______.
A. The Sun and the Tides B. Discoveries in Biology
C. A scientific Study D. A Living Clock

答案

40---43 BDDD

解析

略

举一反三

C
Have you ever picked a job based on the fact that you were good at

it but later found it made you feel very uncomfortable over time? When you select your career, there’s whole lot more to it than assessing your skills and matching them with a particular position. If you ignore your personality, it will hurt you long-term regardless of your skills or the job"s pay. There are several areas of your personality that you need to consider to help you find a good job. Here are a few of those main areas:
1) Do you prefer working alone or with other people?
There are isolating(使孤立) jobs that will drive an outgoing person crazy and also interactive jobs that will make a shy person uneasy. Most people are not extremes in either direction but do have a tendency that they prefer. There are also positions that are sometimes a combination of the two, which may be best for someone in the middle who adapts easily to either situation.
2) How do you handle change?
Most jobs these days have some elements of change to them, but some are more than others. If you need stability in your life, you may need a job where the changes don"t happen so often. Other people would be bored of the same daily routine.
3) Do you enjoy working with computers?
I do see this as a kind of personality characteristic. There are people who are happy to spend more than 40 hours a week on a computer, while there are others who need a lot of human interaction throughout the day. Again, these are extremes and you"ll likely find a lot of positions somewhere in the middle as well.
4) What type of work environment do you enjoy?
This can range from being in a large building with a lot of people you won"t know immediately to a smaller setting where you"ll get to know almost all the people there fairly quickly.
5) How do you like to get paid?
Some people are motivated by the pay they get, while others feel too stressed to be like that. The variety of payment designs in the sales industry is a typical example for this.
Anyway, these are a great starting point for you. I"ve seen it over and over again with people that they make more money over time when they do something they love. It may take you a little longer, but making a move to do what you have a passion for can change the course of your life for the better.
49．This passage mainly talks about the importance of _______.
A．different jobs      B．personalities    C．personal skills     D．job’s pay
50．Which of the following is TRUE according to the passage?
A．Isolating jobs usually drive people mad.
B．Interactive jobs make people shy easily.
C．Extreme people tend to work with others.
D．Almost everyone has a tendency in jobs.
51．What is the missing word about a job search in the following chart?
A．Design   B．Skills     C．Cooperation    D．Hobbies

52．What is the best title for this passage?
A．Lifestyles and Job Pay B．Jobs and Environment
C．Job Skills and Abilities D．Personalities and Jobs

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完型填空（共20小题；每小题1分，满分20分）
There are more than forty universities in Britain—nearly twice as many as in 1960. During the 1960s eight completely new ones more founded, and ten other new ones were created
__16__ converting old colleges of technology into universities. In the same period the__17__of students more than doubled, from 70, 000 to __18__ than 200, 000. By 1973 about 10% of men aged from eighteen __19__twenty one were in universities and about 5% of women.
All the universities are private institutions. Each has its __20__governing councils, _21__some local businessmen and local politicians as__22__as a few academics（大学教师）. The state began to give grants to them fifty years __23__, and by 1970 each university derived nearly all its __24__from state grants. Students have to _25_ fees and living costs, but every student may receive from the local authority of the place __26_ he lives a personal grant which is enough to pay his full costs, including lodging and _27__unless his parents are __28__. Most __29__take jobs in the summer _30__about six weeks, but they do not normally do outside _31__during the academic year. The Department of Education takes __32__for the payments which cover the whole expenditure of the __33__, but it does not exercise direct control. It can have important influence __34__new developments through its power to distribute funds, but it takes the advice of the University Grants Committee, a body which is mainly _35__ of academics.
16. A. with           B. by           C. at               D. into
17. A. amount         B. quantity      C. lot              D. number
18. A. more           B. much        C. less             D. fewer
19. A. with           B. to          C. from             D. beyond
20. A. self            B. kind         C. own             D. personal
21. A. making        B. consisting  C. including          D. taking
22. A. good          B. long          C. little          D. well
23. A. ago           B. before         C. after         D. ever
24. A. suggestions    B. grades   C. profits           D. funds
25. A. make        B. pay           C. change       D. delay
26. A. what         B. which         C. where         D. how
27. A. living        B. drinking       C. food             D. shelter
28. A. poor         B. generous       C. kindhearted          D. rich
29. A. professor     B. students C. politicians           D. businessmen
30. A. at           B. since          C. with                D. for
31. A. travel        B. work    C. experiment          D. study
32. A. responsibility B. advice         C. duty           D. pleasure
33. A. government   B. school        C. universities       D. committees
34. A. at           B. to             C. on                 D. form
35. A. consisted     B. composed     C. made               D. taken

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D
A sunflower is a sunflower . A mobile phone is a mobile phone . But can you combine the two to do something for your local environment?
As early as next year it may well be possible. When you have finished with your mobile phone you will be able to bury it in the garden or a plant pot and wait for it to flower. A biodegradable (能进行生物

递降分解的) mobile phone was, this month, introduced by scientists.
Scientists have come up with a new material over the last five years. It looks like any other plastic and can be hard or soft, and able to change shape. Overtime it can also break down into the soil without giving out any toxic chemicals. British researchers used the new material to develop a phone cover that contains a sunflower seed. When this new type of cover turns into waste, it forms nitrates (硝酸钾). These feed the seed and help the flower grow. Engineers have designed a small transparent window to hold the seed.

They have made sure it only grows when the phone is thrown away. "We"ve only put sunflower seeds into the covers so far. But we are working with plant experts to find out which flowers would perform best. Maybe we could put roses in next time," said one scientist.

As phone technology is developing so quickly people are constantly throwing their mobiles away. This means manufacturers are under pressure to find ways of recycling them. Some 650 million mobile phones have been sold this year. Most of them will be thrown away within two years, adding plastic, heavy metal and chemical waste to the environment. A biodegradable cover can offer some relief for nature, according to the scientists. "The seed is released and the flower grows in the pot so you don"t have to concern yourself with the phone when you have finished using it," said Kerry Kirwan. She leads the research team, which is based at the University of Warwick in Britain.
67. The main idea of the passage is ________ .
A. the relationship between high tech and environment
B. the phone technology is developing
C. how to grow sunflowers
D. mobile phone and environment
68. The purpose of introducing a biodegradable mobile phone is ______ .
A. to encourage consumers to recycle
B. to prevent consumers from throwing their phones away
C. to meet consumers’ need
D. to help consumers know which flower can best perform
69. What is the possible meaning of the underlined word ?
A. pleasant B. poisonous C. useful D. new
70. Which of the following statements is NOT true ?
A.Engineers have designed a small transparent window to hold the rose seed .
B. Mobiles with biodegradable covers can do good to nature .
C.Manufacturers are under pressure to find ways of recycling mobiles .
D. The flower only grows when the phone is thrown away .

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(D)
Malaria, the world"s most widespread parasitic（寄生虫引起的）disease, kills as many as three million people every year—almost all of whom are under five, very poor, and African. In most years, more than five hundred million cases of illness result from the disease, although exact numbers are difficult to assess because many people don"t （or can"t） seek care. It is not unusual for a family earning less than two hundred dollars a year to spend a quarter of its income on malaria treatment, and what they often get no longer works. In countries like Tanzania, Mozambique, and the

Gambia, no family, village, hospital, or workplace can remain unaffected for long.
Malaria starts suddenly, with violent chills, which are soon followed by an intense fever and, often, headaches. As the parasites multiply, they take over the entire body. Malaria parasites live by eating the red blood cells they infect （感染）. They can also attach themselves to blood vessels in the brain. If it doesn"t kill you, malaria can happen again and again for years. The disease passed on to humans by female mosquitoes infected with one of four species of parasite. Together, the mosquito and the parasite are the most deadly couple in the history of the earth—and one of the most successful. Malaria has five thousand genes, and its ability to change rapidly to defend itself and resist new drugs has made it nearly impossible to control. Studies show that mosquitoes are passing on the virus more frequently, and there are more outbreaks in cities with large populations. Some of the disease"s spread is due to global warming.
For decades, the first-choice treatment for malaria parasites in Africa has been chloroquine, a chemical which is very cheap and easy to make. Unfortunately, in most parts of the world, malaria parasites have become resistant to it. Successful alternatives that help prevent resistance are already available, but they have been in short supply and are very expensive. If these drugs should fail, nobody knows what would come next.
76. According to paragraph 1, many people don"t seek care because _______.
A. they are too poor
B. it is unusual to seek care
C. they can remain unaffected for long
D. there are too many people suffering from the disease
77. People suffering from malaria _______.
A. have to kill female mosquitoes      B. have ability to defend parasites
C. have their red blood cells infected    D. have sudden fever, followed by chills
78. Which of the following may be the reason for the wide spread of the disease?
A. Its resistance to global warming.
B. Its ability to pass on the virus frequently.
C. Its outbreaks in cities with large populations.
D. Its ability to defend itself and resist new drugs.
79. It can be inferred from the passage that _______.            .
A. no drugs have been found to treat the disease
B. the alternative treatment is not easily available to most people
C. malaria has developed its ability to resist parasites
D. nobody knows what will be the drug to treat the disease
80. Which of the following questions has NOT been discussed in the passage?
A. How can we know one is suffering from malaria?
B. How many people are killed by malaria each year?
C. Why are there so many people suffering from malaria?
D. What has been done to keep people unaffected for long?

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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 th

e 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

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