题目内容

In previous times，when fresh meat was in short________，pigeons were kept by many households as a source of food．

A.
store
B.
need
C.
vain
D.
supply

D
in short supply供应(量)不足。

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“Children who eat less salt and drink fewer sugar-sweetened soft drinks may significantly lower their risks of obesity,” researchers recently reported in the journal Hypertension.

“Sugar-sweetened soft drinks are a significant source of calorie intake in children,” said Feng J. He, a researcher at St George’s University of London, England. “It has been shown that sugar-sweetened soft drink consumption is related to obesity in young people.” They wanted to know whether there is a link between salt intake and sugar-sweetened soft drink consumption.

Dr He and colleagues analyzed data from a 1997 national survey of more than 2,000 people between 4 and 18 in Britain. “We found that children eating a lower-salt diet drank less fluid,” said He. “From our research, we estimated that 1 gram of salt cut from their daily diet would reduce fluid intake by 100 grams per day.”

The researchers also found that children eating a lower-salt diet drank fewer sugar-sweetened soft drinks. From their research, they predicted that reducing salt intake by 1 gram each day would reduce sugar-sweetened soft drink consumption by 27 grams per day, after. “If children aged 4 to 18 cut their salt intake by half, there would be a decrease of about two sugar-sweetened soft drinks per week per child, so each child would decrease calorie intake by almost 250 kilocalories per week,” Dr He said.

In previous studies, researchers found that a low-salt diet lowers blood pressure in children, and prevents the development of high blood pressure later in life. “Both high blood pressure and obesity increase the risk of having strokes and heart attacks,” Dr He said.

Dr He recommends that parents check labels and choose low-salt food products. “Small reductions in the salt content of 10 to 20 percent cannot be detected by the human salt taste receptors (感受器) and do not cause any technological or safety problems,” Dr He said.

According to the passage, obesity is directly linked to ______.

A. high-salt foods

B. sugar-sweetened soft drinks

C. high blood pressure

D. strokes and heart attacks

Compared with previous studies, the recent one found that ______.

A. a lower-salt diet may mean less sugar-sweetened soft drink consumption

B. a low-salt diet keeps children out of high blood pressure

C. children face the risk of having strokes and heart attacks

D. low-salt food products do not do harm to people’s health

Which of the following statements would Dr He agree to?

A. The less salt people eat, the healthier people become.

B. Children should reduce fluid intake in their daily life.

C. No high-salt food products will be available in shops.

D. A low-salt diet may prevent both high blood pressure and obesity.

After reading the passage, who should take effective action?

A. Children. B. Parents. C. Doctors. D. Researchers.

The greatest recent social changes have been in the lives of women. During the twentieth century there has been a remarkable shortening of the proportion of a woman's life spent in caring for children. A woman marrying at the end of the nineteenth century would probably have been in her middle twenties, and would be likely to have seven or eight children, of whom four or five lived till they were five years old. By the time the youngest was fifteen, the mother would have been in her early fifties and would expect to live a further twenty years, during which customs, opportunity and health made it unusual for her to get paid work. Today women marry younger and have fewer children. Usually a woman's youngest child will be fifteen when she is forty－five and can be expected to live another thirty－five years and is likely to take paid work until retirement at sixty. Even while she has the care of children, her work is lightened by household appliances and convenience foods.

This important change in women's life－pattern has only recently begun to have its full effect on women's economic position. Even a few years ago most girls left school at the first opportunity, and most of them took a full－time job. However, when they married, they usually left work at once and never returned to it. Today the school－leaving age is sixteen, many girls stay at school after that age, and though women tend to marry younger, more married women stay at work at least until shortly before their first child is born. Very many more afterwards return to full－or－part－time work. Such changes have led to a new relationship in marriage: with the husband accepting a greater share of the duties and satisfactions of family life, and with both husband and wife sharing more equally in providing the money, and running the home, according to the abilities and interests of each of them.

6. Which of the following is the topic of this passage?

A. The marriage of women: past and present.

B. Women and their jobs.

C. The social changes in the lives of women.

D. Women's role in family life.

7. At the beginning of the twentieth century, the amount of time the women spent taking care of children ________.

A. was shorter than in previous centuries

B. was longer than in previous centuries

C. was considered to be surprisingly long

D. accounted for a great part of their lives

8. One reason why the woman of today may take a job is that she ________.

A. is younger when her children are old enough to look after themselves

B. does not like children herself

C. need not worry about food for her children

D. can retire from family responsibilities when she reaches sixty

9. According to the passage, it is now quite usual for women to ________.

A. stay at home after leaving school

B. marry men younger than themselves

C. start working again later in life

D. marry while still at school

10. What can be inferred from the last sentence?

A. The husband tends to share greater share of duties of family life.

B. In the past, the husband used to provide money for the family while the wife ran the home.

C. The wife does not have her own abilities and interests.

D. Both the husband and the wife should be satisfied with their family life.

New genetic analysis has revealed that many Amazon tree species are likely to survive human-made climate warming in the coming century, contrary to previous findings that temperature increases would cause them to die out. A study,   1  in the latest edition of Ecology and Evolution, reveals the   2  age of some Amazonian tree species -- more than 8 million years -- and   3  shows that they have survived previous periods as warm as many of the global warming imagined periods   4  for the year 2100.
The authors write that, having survived warm periods in the past, the trees will   5  survive future warming, provided there are no other major environmental changes.   6  extreme droughts and forest fires will impact Amazonia as temperatures   7 , the trees will stand the direct impact of higher temperatures. The authors   8  that as well as reducing greenhouse gas emissions to minimize the risk of drought and fire, conservation policy should remain   9  on preventing deforestation（采伐森林）for agriculture and mining.
The study disagrees with other recent researches which predicted tree species’ extinctions   10  relatively small increases in global average air temperatures.
Study co-author Dr Simon Lewis (UCL Geography) said the   11  were good news for Amazon tree species, but warned that drought and over-exploitation of the forest remained major   12  to the Amazon’s future.
Dr Lewis said: “The past cannot be compared directly with the future. while tree species seem likely to   13  higher air temperatures than today, the Amazon forest is being transformed for agriculture and   14 , and what remains is being degraded by logging, and increasingly split up by fields and roads.
“Species will not move as freely in today’s Amazon as they did in previous warm periods, when there was no human   15 . Similarly, today’s climate change is extremely fast, making comparisons with slower changes in the past   16 .”
“With a clearer   17  of the relative risks to the Amazon forest, we   18  that direct human impacts -- such as forest clearances for agriculture or mining -- should remain a key point of conservation policy. We also need more aggressive   19  to reduce greenhouse gas emissions in order to make minimum the risk of drought and fire impacts and   20  the future of most Amazon tree species.”

They wear the latest fashions with the most up-to-date accessorise(配饰)。Yet these are ginrls in their teens or twenties but women in their sixties and seventies.A gengration which would once only wear old-fashioned clothes is now faouring the same high street looks worn by those half their age.
Professor Julia Twigg, a social policy expert , said ,“Wimen over 75 are now shopping for clothes more frequently than they old when they were young in the 1960s .In the 1960s buying a coat for a woman was a serious matter . It was an expensive item that they would puechase only every three or four years — now you can pick one up at the supernnackrt whosever you wish to .Fashion is a lot cheaper and peope fet tired of things more quickiy . ”
Fashion designer Angela Barnard ,who runs own fashion business in London ,said older women were much more affected celebrity(名流) style than in previous years .
She said ,“When people see stars such as Judi Dench and Helen Mirren looking attractive and fashionable in their sixties ,they want to follow them . Older women are much more aware of celebrities .There’s also the boom in TV programmes showing people how they can change theiy look,and many of my older customers do roga to stay in shape well in their fifties . When I started my business a fen years ago .my older customers wended to be very rich, but now they are what I would call ordinary women .My own mother is 61 and she wears the latest fashions in a way she would caill ordinsry women .My own mother is 61 and she wears the latest fashions in a way she would never have done ten yeare ago.”
59. Professor Twigg found that ,compared with the 1960s,_______.
A. the price of clothes has generally fallen by 70%
B. the spending on clothes has increased by 5% or 6%
C. people spend 30% less than they did on cotothes
D. the amount of chothes bought has risen by 5% or 6%
60. What can we learn about old women in terms of fashion？
A.They are often ignored by fashion designers .
B. They are now more easily influenced by stars .
C. They are regarded as pioneers in the latest fashion .
D. They are more interested in clothes because of their old age .
61. It can be concluded that old women tend to wear the latest fashions today mainly because.
A. they get tired of things more quickly
B.TV shows teach them how to change look
C. they are in much better shape now
D. clothes are much cheaper than before
62. Which is the best possible title of the passage ?
A. Age Is No Barrier for Fashion Fans
B.The More Fashionable ,the Less Expensive
C.Unexpected Changes in Fashion
D.Boom of the British Fashion Industry

British and American scientists are raising genetically modified(转基因的) pigs in the hope of providing organs for transplant(移植) to humans, the project leader wrote in a newspaper Sunday.
Scientists in London and California have begun conducting the genetic experiments to find a solution to record–long waiting lists for organ transplants, Robert Winston said in an opinion piece written for Britain's Sunday Times.
In Britain alone, around 8,000 patients are waiting for a transplant.
"People needing a new heart or liver are waiting for someone else to die – usually a violent death in a traffic accident," Winston wrote in the newspaper. He said his team was "trying to modify pigs so their organs might save the lives of humans."
The scientists are introducing human genes into the animals to reduce the chances of the organs being rejected by patients, as has been common in previous attempts to use animal tissues, said Winston, who heads the Institute of Reproductive and Developmental Biology at London's Hammersmith Hospital.
Working with Dr. Carol Redhead of the California Institute of Technology, Winston's team has injected human genes directly into male piglets(猪仔), adding them to the animal's sperm(精子).
He said that pigs involved in experiments had successfully produced transgenic sperm, but acknowledged that British and European laws had prevented the team from using the pigs to mate.
The Sunday Times newspaper reported that the experiments would be moved to the United States following difficulties with funding and regulations in Britain. It said the pigs would be bred in Missouri.
"Our U.S. friends will benefit from our technology and the income we might have produced for Britain will be lost," Winston wrote.
Some scientists have previously blamed the idea of using animal organs for human transplant, saying the technique risks spreading animal viruses to humans. Winston said his research project is attempting to breed virus-free pigs.
49. Scientists are introducing human genes into the animals to ____________.

A. make the organs healthier	B. reduce the pain of animals
C. make the organs live longer	D. reduce the chances of rejection

50. Some scientists have blamed the idea of using animal organs for human transplant because ____________.

A. the technique is not perfect now

B. humans may be infected with animal viruses

C. it is against laws and regulations

D. it may cause a conflict between humans and animals

51. According to Winston, it seems ___________ to Britain to move the experiments to the United States.

52. It can be inferred from the passage that ____________.

A. animal organs are commonly used for human transplant now

B. lots of patients need animal organ transplants now

C. examples of the animal tissues being rejected have happened

D. it is not safe to use animal organs for human transplant

In previous times，when fresh meat was in short________，pigeons were kept by many households as a source of food．

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