For several years, scientists have been testing a substance called interferon(干扰素), a possible wonder drug that is proving to be effective in treating a variety of diseases, including virus infections, bacterial infections, and cancers. To date, the new drug has no side effect of great influence to discourage its use. But in spite of its success, last year only one gram was produced in the entire world.
The reason for the shortage lies in the structure of interferon. A special protein, the interferon produced from one animal species cannot be used in treating another animal species. In other words, to treat human beings, only interferon produced by human beings may be used. The drug is produced by infecting white blood cells with a virus. Fortunately, it is so effective that the amount given to each patient each time is very small.
Unlike antibiotics (抗生素), interferon does not attack germs directly. Instead, it protects healthy cells from being infected, and prevents the reproduction of viruses within cells.
As you might conclude, one of the most special uses of interferon has been in the treatment of cancer. Dr. Hans Strander, a research physician at Sweden’s famous Karolinska Institute, has treated more than one hundred cancer patients with the new drug. Among a group of selected patients who had received operations for advanced cancer, half were given traditional treatments and the other half were given interferon. Among those treated with interferon 70 percent of them remained alive over three years, as compared with only 10 to 30 percent among those who had received the traditional treatments.
In the United States, a large-scale project supported by the American Cancer Society is now under way. If the experiment were successful, interferon could become one of the greatest medical discoveries of our time.What is the difference between antibiotics and interferon?
| A．Interferon has serious side effects, while antibiotics do not. |
| B．Antibiotics kill germs by attacking them directly, while interferon does not. |
| C．Antibiotics are very effective, while the effect of interferon is limited. |
| D．They are different in structure, although they are both proteins. |
According to the passage, if 170 cancer patients received interferon treatment, how many of them would remain alive over three years?
| A．About 30. |
| B．About 50. |
| C．About 120. |
| D．About 70. |
The passage tells us that ________.
| A．it is difficult to produce interferon in large quantities because of its special structure. |
| B．interferon is produced widely in lots of countries. |
| C．few of the patients who had received traditional treatments remained alive. |
| D．most of the patients who received interferon also needed traditional treatments. |
Wealth starts with a goal saving a dollar at a time. Call it the piggy bank strategy(策略). There are lessons in that time-honored coin-saving container.
Any huge task seems easier when reduced to baby steps. I f you wished to climb a 12,000-foot mountain, and could do it a day at a time, you would only have to climb 33 feet daily to reach the top in a year. If you want to take a really nice trip in 10 years for a special occasion, to collect the $15,000 cost, you have to save $3.93 a day. If you drop that into a piggy bank and then once a year put $1,434 in a savings account at 1% interest rate after-tax, you will have your trip money.
When I was a child, my parents gave me a piggy bank to teach me that, if I wanted something, I should save money to buy it. We associate piggy banks with children, but in many countries, the little containers are also popular with adults. Europeans see a piggy bank as a sign of good fortune and wealth. Around the world, many believe a gift of a piggy bank on New Year’s Day brings good luck and financial success. Ah, but you have to put something in it.
Why is a pig used as a symbol of saving? Why not an elephant bank, which is bigger and holds more coins? In the Middle Ages, before modern banking and credit instruments, people saved money at home, a few coins at a time dropped into a jar or dish. Potters(制陶工) made these inexpensive containers from an orange-colored clay(黏土) called “pygg,” and folks saved coins in pygg jars.The Middle English word
for pig was “pigge”. While the Saxons pronounced pygg, referring to the clay, as “pug”, eventually the two words changed into the same pronunciation, sounding the “i” as in pig or piggy. As the word became less associated with the orange clay and more with the animal, a clever potter fashioned a pygg jar in the shape of a pig, delighting children and adults. The piggy bank was born.
Originally you had to break the bank to get to the money, bringing in a sense of seriousness into savings. While piggy banks teach children the wisdom of saving, adults often need to relearn childhood lessons. Think about the things in life that require large amounts of money--- college education, weddings, cars, medical care, starting a business, buying a home, and fun stuff like great trips. So when you have money, take off the top 10%, put it aside, save and invest wisely. What is the piggy bank strategy?
| A．Paying 1% income tax at a time. |
| B．Setting a goal before making a travel plan. |
| C．Aiming high even when doing small things. |
| D．Putting aside a little money regularly for future use. |
Why did the writer’s parents give him a piggy bank as a gift?
| A．To delight him with the latest fashion. |
| B．To encourage him to climb mountains. |
| C．To help him form the habit of saving. |
| D．To teach him English pronunciation. |
What does then underlined word “something”(Paragraph 3) most probably refer to?
| A．Money | B．Gifts |
| C．Financial success | D．Good luck |
The piggy ban originally was _________.
| A．a potter’s instrument |
| B．a cheap clay container |
| C．an animal-shaped dish |
| D．a pig-like toy for children |
The last paragraph talks about ________.
| A．the seriousness of educating children |
| B．the enjoyment of taking a great trip |
| C．the importance of managing money |
| D．the difficulty of starting a business |
Metro Pocket Guide
Metrorail (地铁)
Each passenger needs a farecard to enter and go out .Up to two children under age five may travel free with a paying customer .
Farecard machines are in every station .Bring small bills because there are no change machines in the stations and farecard machines only provide up to $5 in change.
Get one ticket of unlimited Metrorall rides with a One Day Pass .Buy it from a farecard machine in Metro stations .Use it after 9:30 a,m. until closing on weekdays , and all day on weekends and holidays .
Hours of service
Open 5am Mon-Fri 7a.m Sat-Sun
Close midnight Sun-Thurs. 3a.m. Sat-Sun
Last train times vary .To avoid missing the last train , please check the last train time posted in the station.
Train times Posted in stations
Metrobus
When paying with exact charge , the fare is $1.35.When paying with a SmatTripⓇcard , the fare is 1.25.
Fares for the senior/ disabled customers
Senior citizens 65 and older and disabled customers may ride for half the regular fare .On Metrorail and Metrobus , use a senior/disabled farecard or Smar/Trip Ⓡ card .For more information about buying senior .disabled farecards , farecard or SmarTripⓇcards and passes , please visit MetroOpensDoors .com or call 202-637-7000and 202-637-8000.
Senior citizens and disabled customers can get free guide on how to use proper Metrobus and Metrorall services by calling 202-962-1100.
Travel tips (提示)
. Avoid riding during weekday rush periods -before 9:30 a.m. and between 4and 6p.m.
. If you lose something on a bus or train or in a station, please call Lost &Found at 202-962-1195,
| 1． |
What should you know about farecard machines?
|
| 2． |
At what time does Metroarll stop service on Saturday ?
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| 3． |
What is good about a SmarTripⓇcard ? A. It is convenient for old people . |
| 4． |
Which number should you call if you lose something on the Metro?
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One of the latest trend（趋势） in American Childcare is Chinese au pairs. Au Pair in Stamford, for example, has got increasing numbers of request for Chinese au pairs from aero to around 4,000 since 2004. And that’s true all across the country.
“I thought it would be useful for him to learn Chinese at an early age” Joseph Stocke, the managing director of s company, says of his 2-year old son. “I would at least like to give him the chance to use the language in the future,” After only six months of being cared by 25-year-old woman from China, the boy can already understand basic Chinese daily expressions, his dad says.
Li Drake, a Chinese native raising two children in Minnesota with an American husband, had another reason for looking for an au pair from China. She didn’t want her children to miss out on their roots.” Because I am Chinese, my husband and I wanted the children to keep exposed to(接触) the language and culture.” she says.
“Staying with a native speaker is better for children than simply sitting in a classroom,” says Suzanne Flynn, a professor in language education of Children.” But parents must understand that just one year with au pair is unlikely to produce wonders. Complete mastery demands continued learning until the age of 10 or 12.”
The popularity if au pairs from China has been strengthened by the increasing numbers of American parents who want their children who want their children to learn Chinese. It is expected that American demand for au pairs will continue to rise in the next few years.What does that term” au pair” in the text mean?
| A．A mother raising her children on her own |
| B．A child learning a foreign language at home |
| C．A professor in language education of children |
| D．A young foreign woman taking care of children. |
Li Drake has her children study Chinese because she wants them ______.
| A．to live in China some day |
| B．to speak the language at home |
| C．to catch up wit other children |
| D．to learn about the Chinese culture |
What can we infer from the text?
| A．Learning Chinese is becoming popular In America, |
| B．Educated woman do better in looking after children |
| C．Chinese au pairs need to improve their English Skills. |
| D．Children can learn a foreign language well in six months. |
Since the first Earth Day in 1970,American have gotten a lot “greener” toward the environment . “We didn’t know at that time there even was an environment ,let alone that there was a problem with it,” says Bruce Anderson, president of Earth Day USA.
But what began as nothing important in public affairs has grown into a social movement .Business people, political leaders, university professors, and especially millions of grass-roots Americans are taking part in the movement. “The understanding has increased many ,many times,” says Gaylord Nelson, the former governor from Wisconsin, who thought up the first According to US government reports , emissions (排放)from cars and trucks have dropped from 10.3 million tons a year to 5.5 tons .The number of cities producing CO beyond the standard has been reduced from 40 to 9 .Although serious problems still remain and need to be dealt with , the world is a safer and healthier place .A kind of “Green thinking ” has become part of practices .
Great improvement has been achieved .In 1988 there were only 600 recycling programs ,; today in 1995 there are about 6,600 .Advanced lights ,motors , and building designs have helped save a lot of energy and therefore prevented pollution .
Twenty –five years ago , there were hardly any education programs for environment .Today , it’s hard to find a public school , university , or law school that does not have such a kind of program .” Until we do that , nothing else will change! ” say Bruce Anderson .According to Anderson , before 1970, Americans had little idea about ___
| A．the social movement |
| B．recycling techniques |
| C．environmental problems |
| D．the importance of Earth Day |
Where does the support for environmental protection mainly come from?
| A．The grass –roots level |
| B．The business circle |
| C．Government officials |
| D．University professors |
What have Americans achieved in environmental protection ?
| A．They have cut car emissions to the lowest |
| B．They have settled their environmental problems |
| C．They have lowered their CO levels in forty cities. |
| D．They have reduced pollution through effective measures . |
What is especially important for environmental protection according to the last paragraph ?
| A．Education |
| B．Planning |
| C．Green living |
| D．CO reduction |
Arriving in Sydney on his own from India, my husband ,Rashid, stayed in a hotel for a short time while looking for a house for me and our children.
During the first week of his stay, he went out one day to do some shopping. He came back in the late afternoon to discover that his suitcase was gone. He was extremely worried as the suitcase had all his important papers, including his passport.
He reported the case to the police and then sat there，lost and lonely in strange city, thinking of the terrible troubles of getting all the paperwork organized again from a distant country while trying to settle down in a new one.
Late in the evening, the phone rang. It was a stranger. He was trying to pronounce my husband's name and was asking him a lot of questions. Then he said they had found a pile of papers in their trash can（垃圾桶）that had been left out on the footpath.
My husband rushed to their home to find a kind family holding all his papers and documents. Their young daughter had gone to the trash can and found a pile of unfamiliar papers. Her parents had carefully sorted them out, although they had found mainly foreign addresses on most of the documents. At last they had seen a half-written letter in the pile in which my husband had given his new telephone number to a friend.
That family not only restored the important documents to us that day but also restoredour faith and trust in people. We still remember their kindness and often send a warm wish their way.
| 1． |
What did Rashid plan to do after his arrival in Sydney?
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| 2． |
The girl's parents got Rashid's phone number from.
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| 3． |
What does the underlined word "restored" in the last paragraph mean?
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| 4． |
Which of the following can be the best title for the text?
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