Although websites such as Facebook and MySpace experienced rapid growth during the middle of the first decade of the 21st century, some users remain unaware of the fact that the information they post online can come back to haunt them. First, employers can monitor employees who maintain a blog, photo diary, or website. Employers can look for controversial(引起爭議的) employee opinions, sensitive information disclosures, or wildly inappropriate conduct. For example, a North Carolina newspaper fired one of its features writers after she created a blog on which she wrote about the strange things of her job and coworkers without signing her real name.
The second unintended use of information from social networking websites is employers who check on prospective employees. A June 11, 2006 New York Times article reported that many companies use search engines and social networking websites such as MySpace, Xanga, and Facebook to conduct background checks on college campuses. Although the use of MySpace or Google to check a student’s background is somewhat unsettling to many undergraduates, the Times noted that the use of Facebook is especially shocking to students who believe that Facebook is limited to current students and recent alum(校友).
Corporate employers are not the only people interested in college students’ lives. The third unintended use of social networking websites is college administrators who monitor the Internet — especially Facebook — for student bad behavior. For example, a college in Boston’s Back Bay expelled (除名) its student Government Association President for joining a Facebook group highly critical of a campus police sergeant. In addition, fifteen students at a state university in North Carolina faced charges in court for underage drinking because of photos that appeared on Facebook.
Although more users of websites such as Facebook are becoming aware of the potential dangers of online identities, many regular users still fail to take there basic security precautions(警惕). First, only make your information available to a specific list of individuals whom you approve. Second , regularly search for potentially harmful information about yourself that may have been posted by mistake or by a disgruntled
(不滿的)former associate. Thrid, never post obviously offensive material will likely make its way to the wider world. By taking these simple steps, members of the digital world can realize the many benefits of e-community without experiencing some of the damaging unintended consequences.
小題1:The main purpose of the passage is to _____.
A．explain the growth of the digital world from the view of privacy
B．discuss the risks of the digital world and suggest ways to protect yourself
C．propose steps Facebook, MySpace and Google can take to protect user privacy
D．illustrate(說明) potential unintended uses of private information
小題2:The writer implies that users should take all of the following actions to protect their online privacy EXCEPT _____.
A．know to whom you make your online information available
B．a(chǎn)ctively hunt for damaging information posted about you or under your name
C．speak with employers to inform them of any misinformation published about you
D．a(chǎn)void uploading information that would be extremely damaging if it were discovered
小題3:According to the passage, which of the following does the author imply?
A．Information obtained unwillingly from the Internet is permitted in court.
B．It is impossible to protect yourself from unintended uses of information online.
C．Even if you restrict who can view your data, the government may still access it.
D．Done properly, posting offensive information about oneself brings no risk.
小題4:In the last paragraph the author mainly _____.
A．offers detailed examples to support previous viewpoints
B．further explores the ill-effects of the Internet on the protection of privacy
C．summarizes the points of the above paragraphs
D．provides suggestions to overcome the previously mentioned problems

小題1:B
小題2:C
小題3:A
小題4:D

試題分析：作者通過舉例介紹了在許多人因為在網(wǎng)上發(fā)布的信息而受到了困擾，之后作者給出了可以防止造成這種后果的建議。
小題1:主旨題：閱讀全文可知作者通過舉例介紹了在許多人因為在網(wǎng)上發(fā)布的信息而受到了困擾，之后作者給出了可以防止造成這種后果的建議。故選B。
小題2:推理題：根據(jù)最后一段中“only make your information available to a specific list of individuals whom you approve”讓你的信息到一個特定的只有你能批準(zhǔn)的列表，可知A正確；根據(jù)最后一段中“regularly search for potentially harmful information about yourself that may have been posted by mistake or by a disgruntled(不滿的)former associate”定期搜索潛在的對自己有害的信息,這些信息可能是錯貼或一名心懷不滿的前助理發(fā)布的，由此可知B正確；根據(jù)最后一段中“never post obviously offensive material will likely make its way to the wider world”從不發(fā)布會在更廣闊范圍內(nèi)傳播的有攻擊性的材料，因此D正確；根據(jù)例子可知C項錯誤。故選C。
小題3:推理題：根據(jù)第三段中“fifteen students at a state university in North Carolina faced charges in court for underage drinking because of photos that appeared on Facebook”北卡羅萊納州立大學(xué)的15個學(xué)生在法庭上面臨未成年酗酒指控,因為出現(xiàn)在Facebook上的照片，可知網(wǎng)絡(luò)上的信息在法庭上是被承認(rèn)的。故選A。
小題4:推理題：閱讀最后一段內(nèi)容可知作者給出了可以防止網(wǎng)絡(luò)信息泄露造成嚴(yán)重后果的建議。故選D。
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科目：高中英語 來源：不詳 題型：閱讀理解

Did you get a flu shot this year？For the first time，the Centers for Disease Control and Prevention in the US is recommending that all children aged from 6 months to 18 years receive the flu vaccine.
Vaccines battle diseases caused by bacteria and viruses.A weakened form of the germ (病菌) is introduced into the body.The body makes special substances called antibodies (抗體) to fight the germs.If the actual germs were to attack，the antibodies would fight.Because there are many kinds of flu viruses，scientists must create a new vaccine formula (處方) each year.Researchers must make a prediction.
It is like forecasting the weather.Sometimes they are right on，and sometimes they are off.But even when the vaccine does not closely match circulating flu types，it can make the illness less serious.
“The flu vaccine is not as effective as the polio (小兒麻痹癥) vaccine or the measles vaccine，” says Dr.William Schaffner of Vanderbilt University School of Medicine.“It’s not a great vaccine，but it is in fact quite a good vaccine.”
But a flu vaccine doesn’t work for everyone.There are certain people who should be careful about taking it，because the vaccine is produced in eggs.Those who are allergic (過敏的) to eggs should not take it.If you have a fever，you should wait until you recover.
Some people are afraid that they might get the flu from the flu shot.Scientists say that it is not possible，because the viruses in the flu shot are inactivated.But some minor side effects such as low­grade fever and body ache could occur.If they do，they begin soon after the shot and usually last only one to two days.
Did you know？Smallpox was the first disease people tried to prevent by putting a virus into a healthy person.In 1796，English scientist Edward Jenner placed some infected material under a boy’s skin.
小題1:The underlined word “vaccine” (in Para.1) refers to________.
A．virus used for fighting against disease
B．a(chǎn)ntibody to fight the germs
C．formula to fight against disease
D．germ to be injected into the body
小題2:By saying “It’s not a great vaccine，but it is in fact quite a good vaccine.” (in Para.4)，William Schaffner means the flu vaccine________.
A．is as effective as the polio and the measles vaccines
B．is worse，compared with the polio and the measles vaccines
C．does help to make illness less serious
D．is quite good because it works for everyone
小題3:We can infer from the passage that________.
A．those who are not allergic to eggs can take the flu vaccine
B．not all the flu vaccines are effective for everyone
C．you should go to a doctor if you have a fever after taking the flu vaccine
D．it is possible that some people might get the flu from the flu shot
小題4:When people take the flu vaccine，________.
A．they’ll be allergic to eggs
B．their bodies will ache for 5 days
C．they probably have a low fever
D．they won’t catch a flu ever after

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科目：高中英語 來源：不詳 題型：閱讀理解

(2013·宜春五校聯(lián)考)Technology is making life easier for some dairy farmers.They use robotic systems to milk their cows.Cows are trained to follow a series of paths that lead to milking stations.Only one cow at a time can enter a station.
Once inside，the cow is rewarded with food.As the cow eats，a robotic arm cleans and connects the animal to the milking machine.A few minutes later，milking is complete.The gate is opened，the cow is released and the next cow enters.
The robotic systems are designed to operate 24 hours a day.The cows get to decide when they want to be milked.Cows are milked an average of about three times a day.Some are milked four to six times a day.
The cows wear collars around their necks that identify them to the system.A computer keeps records on their eating and milking.A cow is released from the station if the computer decides it should not be milked.
The automated system also measures the temperature and color of freshly produced milk.Milk is thrown away if it does not pass the tests.
Professor Plaut believes the systems will appeal especially to the next generation of farmers.She means young people who are more interested in technology and less interested in working all the time on the farm.Still，she says the price of robotic milking systems will continue to limit their use.
Doug and Tina Suhr have more than 100 cows on their family farm.Last year it became the fourth farm in southeast Minnesota to get a robotic milking system.A recent story in a local agricultural newspaper said the first robot costs 175,000 dollars.The second costs 150,000 dollars.
Doug told AgriNews that wages that would have been paid for one employee in five years will pay for one robot.He says the increase in milk production reaches a high of more than six kilograms per cow per day.
小題1:From the first paragraph，we can infer ________.
A．the robotic system is designed to reduce labor
B．cows can be raised by robots in the future
C．robots direct cows into milking stations
D．cows are kept clean by robots on some farms
小題2:Besides milking cows，the robotic system also can ________.
A．a(chǎn)djust the temperature of milking stations
B．judge the quality of fresh milk
C．improve the appetite of cows
D．keep fresh milk for two weeks
小題3:Why is the robotic system not popular now?
A．Because young people have no interest in it.
B．Because it is difficult to learn how to use it.
C．Because people can't afford to buy it.
D．Because it usually causes the waste of milk.
小題4:According to Doug，what is the wage of an employee per year?
A．$150,000～$175,000.
B．over $75,000.
C．$150,000～$30,000.
D．$30,000～$35,000.

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科目：高中英語 來源：不詳 題型：閱讀理解

If your preschoolers turn up their noses at carrots or celery, a small reward like a sticker(貼畫) for taking even a taste may help get them to eat previously disliked foods, a UK study said.
Though it might seem obvious that a reward could encourage young children to eat their vegetables, the idea is actually controversial, researchers wrote in the American Journal of Clinical Nutrition. That’s because some studies have shown that rewards can backfire and cause children to lose interest in foods they already liked, said Jane Wardle, a researcher at University College London who worked on the study. Verbal praise, such as “Brilliant! You’re a great vegetable taster”, did not work as well.
The study found that when parents gave their small children a sticker each time they took a “tiny taste” of a disliked vegetable, it gradually changed their attitudes. The children were also willing to eat more of the vegetables—either carrots, celery, cucumber, red pepper, cabbage or sugar snap peas—in laboratory taste tests, the study said.
Researchers randomly assigned (分派) 173 families to one of these groups. In one, parents used stickers to reward their children each time they took a tiny sample of a disliked vegetable. A second group of parents used verbal praise. The third group, where Parents used no special vegetable-promoting methods, served as a “control”.
Parents in the reward groups offered their children a taste of the “target” vegetable every day for 12 days. Soon after, children in the sticker group were giving higher ratings to the vegetables—and were willing to eat more in the research lab, going from an average of 5 grams at the start to about 10 grams after the 12-day experience. The turnaround(轉(zhuǎn)機(jī)) also seemed to last, with preschoolers in the sticker group still willing to eat more of the once-disliked vegetable three months later.
Why didn’t the verbal praise work? Wardle said the parents’ words may have seemed “insincere” to their children.
小題1:The purpose of writing the passage is      .
A．to show the procedure of an experiment on children’s diet
B．to introduce a practical method of making children eat vegetables
C．to explain why children hate to eat vegetables
D．to present a proper way of verbal praise to parents
小題2:The underlined word “backfire” in Paragraph 2 probably means “_______”.
A．shoot from behind the back
B．make a fire in the backyard
C．produce an unexpected result
D．a(chǎn)chieve what was planned
小題3:Which of the following statements is true according to the passage?
A．Most children are born to dislike carrots or celery.
B．Children in the sticker group will never lose interest in eating vegetables.
C．Oral praise works quite well in encouraging children to eat vegetables.
D．It remains a question whether rewarding is a good way to get children to eat vegetables.
小題4:What can we learn from the last paragraph?
A．Children like rewards, not verbal praise.
B．Parents should give up verbal praise.
C．Children are difficult to inspire.
D．Parents should praise their children in a sincere tone.

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科目：高中英語 來源：不詳 題型：閱讀理解

Most people know precious gemstones (寶石) by their appearances. An emerald flashes deep green, a ruby seems to hold a red fire inside, and a diamond shines like a star. It’s more difficult to tell where the gem was mined, since a diamond from Australia or Arkansas may appear the same to one from the Democratic Republic of the Congo. However, recently, a team of scientists has found a way to identify a gemstone’s origin.
Beneath the surface of a gemstone, on the tiny level of atoms and molecules（分子）, lie clues (線索) to its origin. At this year’s meeting of the Geological Society of America in Minneapolis, Catherine McManus reported on a technique that uses lasers (激光) to clarify these clues and identify a stone’s homeland. McManus directs scientific research at Materialytics, in Killeen, Texas. The company is developing the technique. “With enough data, we could identify which country, which mining place, even the individual mine a gemstone comes from,” McManus told Science News.
Some gemstones, including many diamonds, come from war-torn countries. Sales of those “blood minerals” may encourage violent civil wars where innocent people are injured or killed. In an effort to reduce the trade in blood minerals, the U.S. government passed law in July 2010 that requires companies that sell gemstones to determine the origins of their stones.
To figure out where gemstones come from, McManus and her team focus a powerful laser on a small sample of the gemstone. The technique is called laser-induced breakdown spectroscopy. Just as heat can turn ice into water or water into steam, energy from the laser changes the state of matter of the stone. The laser changes a miniscule part of the gemstone into plasma, a gas state of matter in which tiny particles（微粒）called electrons separate from atoms.
The plasma, which is superhot, produces a light pattern. (The science of analyzing this kind of light pattern is called spectroscopy.) Different elements（元素）produce different patterns, but McManus and her team say that gemstones from the same area produce similar patterns. Materialytics has already collected patterns from thousands of gemstones, including more than 200 from diamonds. They can compare the light pattern from an unknown gemstone to patterns they do know and look for a match. The light pattern acts like a signature, telling the researchers the origin of the gemstone.
In a small test, the laser technique correctly identified the origins of 95 out of every 100 diamonds. For gemstones like emeralds and rubies, the technique proved successful for 98 out of every 100 stones. The scientists need to collect and analyze more samples, including those from war-torn countries, before the tool is ready for commercial use.
Scientists like Barbara Dutrow, a mineralogist from Louisiana State University in Baton Rouge, find the technique exciting. “This is a basic new tool that could provide a better fingerprint of a material from a particular locality,” she told Science News.
小題1:We learn from Paragraph 1 that __________________.
A．a(chǎn)n emerald and a ruby are names of diamonds.
B．it’s not difficult to tell where the gem was mined.
C．a(chǎn)ppearances help to identify the origin of gemstones.
D．diamonds from different places may appear the same.
小題2:Why did the U.S. government pass law that requires companies selling gemstones to determine the origins of their stones?
A．To look for more gemstones.
B．To encourage violent civil wars.
C．To reduce the trade in blood minerals.
D．To develop the economy.
小題3:Which of the following facts most probably helps McManus and her team in identifying the origin of stones?
A．Heat can turn ice into water or water into steam.
B．Gemstones from the same area produce similar light patterns.
C．Laser can changes a miniscule part of the gemstone into plasma.
D．Materialytics has already collected patterns from thousands of gemstones.
小題4:From the last two paragraphs, what can be inferred about the laser technique?
A．It is ready for commercial use.
B．People can use the new tool to find more gemstones.
C．It can significantly reduce the gemstones trade in blood minerals.
D．It will bring about a revolutionary change in identifying the origin of minerals.
小題5:The author wrote this passage mainly to ________.
A．tell us how to identify the origin of diamonds.
B．introduce a laser technique in identifying a stone’s origin
C．prove identifying the origin of gemstones are difficult
D．a(chǎn)ttract our attention to reducing trade in blood minerals

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科目：高中英語 來源：不詳 題型：閱讀理解

With 10, 600 bicycles in circulation，Paris city officials are hoping the program will provide people with more environmentally friendly transportation．

It seems both Parisians and tourists are taking advantage of the program．Since its launch a little over two weeks ago，Vélib has already seen almost half a million rentals．And，with the addition of 10，000 more bikes and 700 more stations in the next 12 months，city officials expect at least 200，000 regular users by year end．
Parisian Olivier Bioret has already gone for a spin on one of Vélib’s vehicles and plans to make use of them more often．
“It’s a real pleasure—when，like me，you don’t have space enough in your flat to have your
own bike—to be able to discover．to cross Paris and not have to take the subway，”he said．
As a socialist and longtime green activist，Mayor Bertrand Delanoe regards Vélib as just a part of his plan to reduce car traffic and，thus，lower pollution by 2020．
Apart from its environmental benefits，Vélib is also being praised as a way of collecting money for the city，for all the money from rentals goes to the city government．
Paris is not alone in its attempt to profit from the power of the bicycles．
Across the globe，cities such as Barcelona，which stated its bike-share program in March with 1,500 vehicles and 100 stations，and New York，which launched a five-day trial program last month，are using bicycles as a way to cut back on both traffic and pollution．
However，it remains to be seen whether people’s acceptance of these programs is simply a
passing fashion or whether this movement has the power to take root and transform the face of public transportation around the world．
小題1:The real purpose of Vélib is________．
A．to help people save money and space
B．to make some money for the city government
C．to provide convenience to both Parisians and tourists
D．to reduce traffic and pollution in the city
小題2:Which of the following is TRUE according to the passage?
A．There will be 700 stations in one year’s time．
B．There will be over 20, 000 bikes in use in a year．
C．In the first two weeks there were nearly a million rentals．
D．There will be 200, 000 regular rentals each day by year end．
小題3:We can know from the passage that_________．
A．other cities also have such programs
B．Parisians can use the bicycles free of charge
C．Paris sets an example to many other cities
D．Paris is the first city to start such a program
小題4:As to the future of the program，the author is_________．
A．criticalB．optimisticC．uncertain D．negative

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科目：高中英語 來源：不詳 題型：閱讀理解

What would it be like to take a walk on the surface of Mars? If you could design the tallest building in the world, what would it look like? Do you dream of being the next J．K. Rowling? This summer, you can experience all of these things, and more. All you need is an Internet connection and your imagination.
A recent study by the Kaiser Family Foundation found that kids spend an average of 1 hour and 29 minutes online each day. Many kids like to use that time to chat with friends, play games or check e­mails. But the next time you get on the Web, try exploring the world instead. “With the Internet, you can go back 11,000 years in time, or go 11,000 kilometers across the planet.” said Russell, Web search expert of Google. “The whole scope of history and the world is open to you.”
There is a wealth of information to be found online. For example, if your family is going on vacation somewhere，do a quick online search on the area before you even get in the car. “What's the background of the place; what's the history？” says Russell. “I like to tell my kids, ‘Whenever you have a question, whenever you have a doubt, search it out.’”
Ready to launch a virtual journey of your own? Here are a few starting points to get you thinking and to help you on your way. You can invite your parents along for the ride, too. Always ask for permission before downloading programs and software onto your computer. And check with a parent or an adult before visiting a new Web site.
Navigate the world in 3­D with Google Earth. Begin in outer space and zoom(快速移動) into the streets of any city, from Hong Kong to San Francisco. Or visit ancient monuments, watch the changing rainforests over time, and dive underwater to explore tropical reef.
With the Moon in Google Earth tool, you can walk in Neil Armstrong's famous footsteps. Take a guided tour of the moon's surface with Armstrong's fellow shuttle mate astronaut Buzz Aldrin.
When you're exploring that part of the solar system, hop on over to the Red Planet with Google Mars. There, you can move very quickly around the surface and see images from the Mars Rovers.
小題1:The author uses questions in the first passage to ________.
A．introduce the topic of the paragraph
B．question the possibility of realizing the dream
C．a(chǎn)ttract the readers' attention
D．let the readers answer it
小題2:How do you travel around the world in a day according to the passage?
A．By taking the time shuttle.
B．By making use of the Internet
C．By watching 3­D films.
D．By finding a tourism company in Google
小題3:Russell thought ________.
A．the students spent too much time on the Internet
B．the students shouldn't chat and play games online
C．the students could solve their problems through the line
D．the students should learn knowledge instead of chatting online
小題4:What's the purpose of the passage?
A．Encourage the kids to spend more time online.
B．Encourage the kids to do some research on science.
C．Encourage the kids to learn to use the computer.
D．Encourage the kids to explore the world online.

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科目：高中英語 來源：不詳 題型：完形填空

Most parents, I suppose, have had the experience of reading a bedtime story to their children. And they must have        how difficult it is to write a        children's book.  Either the author has aimed too     . , so that the children can't follow what is in his (or more often, her) story,        the story seems to be talking to the readers.
The best children's books are        very difficult nor very simple, and satisfy both the     who hears the story and the adult who         it. Unfortunately, there are in fact       books like this,       the problem of finding the right bedtime story is not        to solve.
This may be why many of books regarded as        of children's literature were in fact written for      . “Alice's Adventure in Wonderland” is perhaps the most        of this.
Children, left for themselves, often      the worst possible interest in literature. Just  leave a child in bookshop or      and he will more  willingly choose the books    in an imaginative way, or have a look at most children's comics ( 連環(huán)畫 ), full of the stories and jokes to which both teachers and right-thinking parents     .
Perhaps we parents should stop trying to persuade children into        our taste in literature. After all children and adults are so       that we parents should not expect that they will enjoy the      books. So I suppose we'll just have to compromise（妥協(xié)） over that bedtime story.
小題1:
A．hopedB．realizedC．toldD．said
小題2:
A．shortB．longC．badD．good
小題3:
A．easyB．shortC．highD．difficult
小題4:
A．a(chǎn)ndB．butC．orD．so
小題5:
A．bothB．neitherC．eitherD．very
小題6:
A．childB．fatherC．motherD．teacher
小題7:
A．hearsB．buysC．understandsD．reads
小題8:
A．fewB．manyC．littleD．much
小題9:
A．butB．howeverC．soD．because
小題10:
A．hardB．easyC．enoughD．fast
小題11:
A．a(chǎn)rticlesB．workC．a(chǎn)rtsD．works
小題12:
A．a(chǎn)dultsB．girlsC．boysD．children
小題13:
A．difficultB．hiddenC．obviousD．easy
小題14:
A．a(chǎn)reB．showC．findD．a(chǎn)dd
小題15:
A．libraryB．school C．homeD．office
小題16:
A．readB．designedC．printedD．written
小題17:
A．favor B．interestC．objectD．read
小題18:
A．receivingB．a(chǎn)cceptingC．havingD．refusing
小題19:
A．sameB．friendlyC．differentD．common
小題20:
A．commonB．a(chǎn)verageC．differentD．same

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科目：高中英語 來源：不詳 題型：閱讀理解

Two new studies suggest that modern running shoes could increase the risk of injuries to runners.
One study involved sixty-eight healthy young women and men who ran at least twenty-four kilometers a week. The runners were observed on a treadmill machine (跑步機(jī)). Sometimes they wore running shoes. Other times they ran barefoot (赤腳).
Researchers from the JKM Technologies company in Virginia, the University of Virginia and the University of Colorado did the study.
They found that running shoes create more stress that could damage knees, hips and ankle joints than running barefoot. They observed that the effect was even greater than the effect reported earlier for walking in high heels.
The study appeared in the official scientific journal of The American Academy of Physical Medicine.
The other study appeared in the journal Nature. It compared runners in the United States and Kenya. The researchers were from Harvard University in Massachusetts, Moi University in Kenya and the University of Glasgow in Scotland.
They divided the runners into three groups. One group had always run shoeless. Another group had always run with shoes. And the third group had changed to shoeless running.
Runners who wear shoes usually come down heel first. That puts great force on the back of the foot. But the study found that barefoot runners generally land on the front or middle of their foot. That way they ease into their landing and avoid striking their heel.
Harvard’s Daniel Lieberman led the study. He says the way most running shoes are designed may explain why those who wear them land on their heels. The heel of the shoe is bigger and heavier than other parts of the shoe, so it would seem more likely to come down first. Also, the heel generally has thick material under it to soften landings.
But the researchers do not suggest that runners immediately start running barefoot. They say it takes some training. And there can be risks, like running when your feet are too cold to feel if you get injured.
The study was partly supported by Vibram, which makes a kind of footwear that it says is like running barefoot. The findings have gotten a lot of attention. But the researchers say there are many problems in the way the press has reported in their paper. So they have tried to explain their findings on a Harvard Website.
小題1:What’s the main idea of the passage?
A．Walking in high heels could cause less serious effects than running barefoot.
B．Two new discoveries encourage people to run in high heels.
C．Running in shoes is partly good to runners.
D．Two new studies prove running without shoes is beneficial to runners in most cases.
小題2:Which part of our body could be injured if we run in running shoes?
A．Toes.B．Hips.C．Feet.D．Legs.
小題3:What can we learn from the passage?
A．The way that we run by landing on the front or middle of our foot could avoid damaging our heel.
B．We should start running barefoot in no time.
C．Running in modern running shoes could cause more serious effects than running in high heels.
D．We won’t be injured if we run barefoot.
小題4:What is the writer’s attitude towards the use of the modern running shoes?
A．Persuasive.B．Negative.C．Objective.D．Supportive.

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