1 . Race walking shares many fitness benefits with running, research shows, while most likely contributing to fewer injuries. It does, however, have its own problem.
Race walkers are conditioned athletes. The longest track and field event at the Summer Olympics is the 50-kilometer race walk, which is about five miles longer than the marathon. But the sport’s rules require that a race walker’s knees stay straight through most of the leg swing and one foot remain in contact (接触) with the ground at all times. It’s this strange form that makes race walking such an attractive activity, however, says Jaclyn Norberg, an assistant professor of exercise science at Salem State University in Salem, Mass.
Like running, race walking is physically demanding, she says, According to most calculations, race walkers moving at a pace of six miles per hour would burn about 800 calories(卡路里) per hour, which is approximately twice as many as they would burn walking, although fewer than running, which would probably burn about 1,000 or more calories per hour.
However, race walking does not pound the body as much as running does, Dr. Norberg says. According to her research, runners hit the ground with as much as four times their body weight per step, while race walkers, who do not leave the ground, create only about 1.4 times their body weight with each step.
As a result, she says, some of the injuries associated with running, such as runner’s knee, are uncommon among race walkers. But the sport’s strange form does place considerable stress on the ankles and hips, so people with a history of such injuries might want to be cautious in adopting the sport. In fact, anyone wishing to try race walking should probably first consult a coach or experienced racer to learn proper technique, she says. It takes some practice.
1. Why are race walkers conditioned athletes?| A．They must run long distances. |
| B．They are qualified for the marathon. |
| C．They have to follow special rules. |
| D．They are good at swinging their legs. |
| A．It’s more popular at the Olympics. |
| B．It’s less challenging physically. |
| C．It’s more effective in body building. |
| D．It’s less likely to cause knee injuries. |
| A．Getting experts’ opinions. |
| B．Having a medical checkup. |
| C．Hiring an experienced coach. |
| D．Doing regular exercises. |
| A．Skeptical. | B．Objective. |
| C．Tolerant. | D．Conservative. |
2 . Polar bears are icons of the Arctic. Detailed monitoring of their populations is crucial for their conservation—but because polar bears are so difficult to find, we are missing critical data about population size. Scientists have now developed a new tool to help: DNA analysis using skin cells left in the bears’ footprints in the snow.
The scientists were inspired by the techniques that can be applied to tiny, degraded DNA samples. With these techniques, it isn’t necessary to physically capture bears, which can be stressful and dangerous for both bears and humans. Instead, the researchers can turn to the snow tracks of polar bears and look at sources of DNA left in passing—environmental DNA. "The tracks usually contain fresh cells, and the DNA is intact because of the cold’ storage’ temperature, "said Dr. Melanie Lancaster of the World Wide Fund, lead author.
The scientists collected snow from individual tracks made by Alaskan polar bears in the wild. Additional materials like hair and saliva(唾液)were sampled, confirming that the tracks provided accurate genotype(基因型) 24 wild polar bear tracks were sampled. The researchers melted and filtered the snow to collect environmental DNA, then carried out micro-satellite analysis. Although the concentrations (浓度)of DNA taken from trucks sampled in the wild were very low, 13 of the wild polar bear samples could be genotype, identifying 12 different individuals.
This technique has huge potential to inform conservation of these animals, to better understand their populations and behavior. Although the sampling has a lower success rate, ease of collection means that it can significantly expand sample sizes.
"We hope this method will be taken up by the polar bear research community, with the involvement of hunters, volunteers, and local communities, as a new way to collect information on polar bears, "said Lancaster. "We also hope the method will be expanded to other animals living in snowy environments. "
1. Why do scientists develop the new method?| A．To improve the environment in the Aretic. |
| B．To protect humans from the polar bears attack. |
| C．To find solutions to global climate change. |
| D．To gather essential data for monitoring polar bears. |
| A．Unknown. |
| B．Undamaged. |
| C．Unusual. |
| D．Unstable. |
| A．They tracked and caught polar bears in the wild. |
| B．They recorded the bears’ behaviors with cameras. |
| C．They analyzed DNA from polar bears’ snowy footprints. |
| D．They compared the polar bears’ genotype with other animals? |
| A．Disapproving. |
| B．Favorable. |
| C．Uncertain. |
| D．Suspicious. |
3 . A shocking 53.6 million tons of electronic waste were discarded（丢弃）last year, a new UN-backed report has revealed. The report shows that e-waste is up 21%from five years ago. This isn't surprising, considering how many more people are adopting new technology and updating devices regularly to have the latest versions, but the report also shows that national collection and recycling strategies are nowhere close to matching consumption rates.
E-waste contains materials including copper（铜）, iron, gold and silver, which the report gives a conservative value of $ 57 billion. But most are thrown away or burned rather than being collected for recycling. Precious metals in waste are estimated to be worth $ 14 billion, but only $4 billion-worth is recovered at the moment.
While the number of countries with national e-waste policies has grown from 61 to 78 since 2014, there is little encouragement to obey and a mere 17% of collected items are recycled. If recycling does occur, it's often under dangerous conditions, such as burning circuit boards to recover copper, which "releases highly poisonous metals" and harms the health of workers.
The report found that Asia has the highest amounts of waste overall, producing 24.9 million metric tons (MMT), followed by Europe at 12 MMT, Africa at 2.9 MMT, and Oceania at 0.7 MMT.
But whose responsibility is it? Are governments in charge of setting up collection and recycling points, or should companies be responsible for recycling the goods they produce? It goes both ways. Companies do need to be held accountable by government regulations and have incentives to design products that are easily repaired. At the same time, governments need to make it easy for citizens to access collection points and deal with their broken electronics in a convenient way. Otherwise, they may turn to the easiest option-the landfill.
1. What can we learn from the first paragraph?| A．What e-waste refers to. |
| B．Where e-waste is collected. |
| C．Why e-waste is increasing rapidly. |
| D．How many kinds e-waste includes. |
| A．The functions of policies. |
| B．The great damage to environment. |
| C．The change of consumption rates. |
| D．The urgency of recovering e-waste. |
| A．It does harm to the workers' health. |
| B．It lacks national policy support. |
| C．It hardly makes profits. |
| D．It takes too much time. |
| A．New technology should be used to update old devices. |
| B．Governments and companies should take responsibilities. |
| C．Non-poisonous metals had better be used in e-device. |
| D．Citizens must play a key role in recycling e-waste. |
4 . My daughter was being thrown out of the sixth grade. The teacher said, “She may not be up to what we’re trying to accomplish.” He was really saying she didn’t have the intelligence. I got mad because I knew she was smart, just as my father had known I was smart when I was failing in school. We had her tested. I decided to get myself tested as well, and found that the troubles she was having were exactly what I had had — dyslexia. By then I was a successful television writer, and had won an Emmy Award for “The Rockford Files.”
If I had known earlier that something beyond my control could explain why I was a low achiever, I may not have worked so hard in my late 20s and early 30s. I was writing and writing. I was working for no other reason than to hear people praise me, because I did badly in all my courses.
I once asked a friend who had always gotten an A, “How long did you study for this?” He said, “I didn’t. I just glanced at it.” So he must be smarter. I began to ask, “What will happen to me when I’m not good at anything?” Despite my doubts, I did become successful, and people now say to me, “So you’ve overcome dyslexia.”
No. You don’t overcome it, you learn to compensate for it. Some easy things are very hard for me. Most people who go through college read twice as fast as I do. I avoid dialing a phone if I can, because I sometimes have to try three times to get the number right.
Despite my weaknesses I view dyslexia as a gift, not a curse (诅咒). Many dyslexics are good at right-brain, abstract thought, and that’s what my kind of creative writing is. And I can write quickly, and can get up to 15 pages a day. Writing is my strength.
The real fear I have for dyslexic children is not they have to struggle in school, but that they will quit on themselves before they get out of school. Parents have to create victories for them, whether it’s music, sports or art. You can make your dyslexic child able to say, “Yeah, reading is hard. But I have other things I can do.”
1. The writer decided to get himself tested as well because he________.| A．wanted to know if they had the same problem |
| B．didn’t believe his daughter had the problem |
| C．had to take a regular medical examination |
| D．accepted that his daughter was not smart |
| A．struggled and got better grades |
| B．didn’t work hard when he was young |
| C．was praised for overcoming dyslexia |
| D．was thankful not knowing of dyslexia earlier |
| A．is less intelligent | B．always fails in school |
| C．reads more slowly than normal people | D．performs worse in left-brain activities |
| A．Clumsy birds have to start flying early. | B．God shuts one door but opens another. |
| C．Never judge a person by his appearance. | D．No one can make a good coat with bad cloth. |
5 . He is regarded as having one of the brightest minds on the planet.But outstanding astrophysicist（天体物理学家）Stephen Hawking admitted that he did not learn to read until he was eight years old.In a public lecture at the Royal Albert Hall,Professor Hawking also admitted that he was not active in studying while at Oxford University,where he studied physics,and that only the diagnosis that he might die young from motor neurone（神经元）disease made him concentrate on his work.
Professor Hawking said,"My sister Philippa could read by the age of 4 and then she was definitely brighter than me."He said that he was unexceptional at school and was never further than halfway up his class."My classwork was very untidy,and my handwriting was the despair of my teachers,"he said."But my classmates gave me the nickname Einstein,so presumably they saw signs of something better."
But he said that it was when doctors told him that he probably only had a few years to live at the age of 21 that he was galvanized into focusing on his work and a period of productivity that resulted in some of his early breakthroughs.He said,"When you are faced with the possibility of an early death,it makes you realize that life is worth living and there are lots of things you want to do."
1. Which of the following is NOT true according to the passage?| A．Stephen Hawking is the second Einstein in the world. |
| B．Stephen Hawking couldn't read at the age of 7. |
| C．Stephen Hawking's handwriting was once terribly bad. |
| D．Stephen Hawking's sister once performed much better than him. |
| A．Patience. | B．Knowledge. | C．Disease. | D．Laziness. |
| A．Stephen Hawking didn't realize his dreams in physics. |
| B．It was possible for Hawking to face the early death. |
| C．The purpose of the doctor's diagnosis was to encourage him to work hard. |
| D．His life might be taken away by long hard work. |
| A．His sister. | B．His classmates. | C．His teachers. | D．His parents. |
6 . Tourist Guide to the National Gallery
Opening hours: Daily 10: 00 am- -6: 00 pm; Friday 10: 00 am- 9: 00 pm
Closed: 2426 December
Reasons to visit:
With over 2, 300 paintings in the collection, there are hundreds of reasons to visit the Gallery. Here are some to get you started...
Get into great art. From Leonardo da Vinci to Vincent van Gogh: See priceless works of art for free.
Get creative. Brush up your skills, and create your own great works of art...
Learn about art. Discover more about paintings...
Regulations:
Talk in a low voice when you use your cellphone in the gallery
Please do not touch the paintings or other exhibits. Do not take pets in or cross the barriers.
Consume food and drink in designated areas only i.e. not in rooms that contain paintings.
Follow our no smoking policy in any part of the building.
Follow our no photograph policy in exhibitions where a sign is displayed.
Access:
The National Gallery aims to make access to the paintings enjoyable and welcoming to the widest possible public. There are a range of facilities to help you see the collection, visit exhibitions and come to events.
The Gallery offers British Sign Language-interpreted talks on paintings for visitors who are deaf, and special art sessions(展期) for visitors who can't see.
Address: The National Gallery, Trafalgar Square London WC2N 5DN
Click here to find more information.
1. What are visitors allowed to do in the National Gallery?| A．Make a phone call. | B．Take a dog in. |
| C．Smoke a cigarette. | D．Take photos. |
| A．Young visitors. | B．Deaf visitors. |
| C．Blind visitors. | D．Old visitors. |
| A．In a newspaper. | B．On a poster. |
| C．In a magazine. | D．On the Internet. |
7 . For Stevens Point locals in the US, the city is flooded with delicious fried fish. Here are four top choices for the community to have a try.
Hilltop Pub&Grill
Hilltop Pub&Grill first opened in the 1980s and took the Stevens Point community by storm with its delicious food and unique decoration style. Its fried fish are beloved due to the use of “high-quality North Atlantic fish, with a light beer batter (面糊)”.
The Final Score Bar&Grill
The Final Score Bar&Grill aimed to become a local hot spot in 2001 when Jim Billings, the owner, took charge of the business. Billings feels that their five batter choices set them apart from their neighboring bars. Besides, various wines are available.
Point After Pub&Grill
Point After Pub&Grill started serving delicious food and cold beers in a welcoming environment in 2009. But its history runs much longer. “Before it was Point After Pub&Grill, it had been Northside Bar for 30 plus years,” explained Molski, the owner. Molski feels that the pub’s four special batter choices and other fish specials are what help make it an area landmark.
Two Harps Pub
This Irish pub opened its doors to the public in 2017 and has been drawing fans and locals ever since. “I had done my career for a long time and was kind of bored with it,” said Nick Moore, the owner. “And this opportunity fell into my lap, so I went with it. It really made sense to open up an Irish bar.” The growing pub advises guests to try a cold beer with their Friday fried fish.
1. What makes Hilltop Pub&Grill popular with customers?| A．The convenient location. | B．The special food. |
| C．The high-quality service. | D．The unique wine. |
| A．They are both run by the same company. | B．They are both famous for great wines. |
| C．They both feature some particular batter. | D．They were both founded ten years ago. |
| A．It is the newest among the four pubs. | B．It offers free cold beers to customers. |
| C．It only provides fried fish on Fridays. | D．It has a unique decoration style. |
8 . One day, Amanda was diagnosed (诊断) with cancer of an early stage. During this time, she was admitted to a college. She planned to save money to meet the college expense and then seek medical treatment for the cancer.
Her father, Clint and her friends didn’t want her to put off her treatment due to the expense. They took matters into their own hands and started a GoFundMe campaign. A longtime friend of the family was cofounder of a group named Praynksters, known for random acts of kindness. The friend decided to use their own group to help the family. The group came up with the creative idea to spread the word and invite families, friends, and strangers who wanted to help to take part in a donation activity. The event induced the enormous assistance from the local community.
Clint and Amanda were moved as the crowd passed by and the donations poured in. The event brought the family over $13, 000 in donations to go towards her medical treatments. The generous act of kindness gave the family a comforting, and optimistic feeling during a time when all hope seemed lost. Clint said that Amanda struggled with the idea of asking for help. She felt guilty and undeserving compared to others who are also struggling. She is still humbled by it all.
After several months of treatment, life for the family has started getting back to their normal routine. Once Amanda got her strength back, she returned to school and completed her bachelor's degree. The family is now inspired to volunteer in their local neighborhood and contribute to crowdfunding (众筹) efforts. They are grateful for the opportunity to give back and help others as many have helped them.
1. Why did Amanda postpone her treatment of cancer?| A．She didn't care about her disease. |
| B．She had to take care of her family. |
| C．She was in a bad economic situation. |
| D．She couldn’t find an effective treatment. |
| A．Brought about. | B．Made up. |
| C．Gave away. | D．Set about. |
| A．Shameful but caring. |
| B．Kind-hearted and grateful. |
| C．Curious and warm-hearted. |
| D．Hard- working and humorous. |
| A．It's quite easy to cure Amanda’s cancer. |
| B．Praynksters is a nonprofit organization funded by Clint. |
| C．Volunteering is very popular in Amanda's community. |
| D．A GoFundMe campaign is actually a crowdfunding activity. |
California condors are North America’s largest birds, with wind-length of up to 3 meters. In the 1980s, electrical lines and lead poisoning(铅中毒) nearly drove them to dying out. Now, electric shock training and medical treatment are helping to rescue these big birds.
In the late 1980s, the last few condors were taken from the wild to be bred(繁殖). Since 1992, there have been multiple reintroductions to the wild, and there are now more than 150 flying over California and nearby Arizona, Utah and Baja in Mexico.
Electrical lines have been killing them off. “As they go in to rest for the night, they just don’t see the power lines,” says Bruce Rideout of San Diego Zoo. Their wings can bridge the gap between lines, resulting in electrocution(电死) if they touch two lines at once.
So scientists have come up with a shocking idea. Tall poles, placed in large training areas, teach the birds to stay clear of electrical lines by giving them a painful but undeadly electric shock. Before the training was introduced, 66% of set-freed birds died of electrocution. This has now dropped to 18%.
Lead poisonous has proved more difficult to deal with. When condors eat dead bodies of other animals containing lead, they absorb large quantities of lead. This affects their nervous systems and ability to produce baby birds, and can lead to kidney(肾) failures and death. So condors with high levels of lead are sent to Los Angeles Zoo, where they are treated with calcium EDTA, a chemical that removes lead from the blood over several days. This work is starting to pay off. The annual death rate for adult condors has dropped from 38% in 2000 to 5.4% in 2011.
Rideout’s team thinks that the California condors’ average survival time in the wild is now just under eight years. “Although these measures are not effective forever, they are vital for now,” he says. “They are truly good birds that are worth every effort we put into recovering them. ”
1. California condors attract researchers’ interest because they _________.
| A．are active at night |
| B．had to be bred in the wild |
| C．are found only in California |
| D．almost died out in the 1980s |
| A．blocking condors’ journey home |
| B．big killers of California condors |
| C．rest places for condors at night |
| D．used to keep condors away |
| A．makes condors too nervous to fly |
| B．has little effect on condors’ kidneys |
| C．can hardly be gotten rid of from condors’ blood |
| D．makes it difficult for condors to produce baby birds |
| A．the average survival time of condors is satisfactory |
| B．Rideout’s research interest lies in electric engineering |
| C．the efforts to protect condors have brought good results |
| D．researchers have found the final answers to the problem |
10 . There’s no doubt that one of the greatest human achievements is the exploration of the space. Ever since astronaut Yuri Gagarin became the first person to be sent into the orbit around the moon in 1961, scientists have been pushing the boundaries further and further. But until now the exploration into the unknown has been dominated (主导) by men.
Of course, in the past, women were also included in the space projects and played an active role on the ground and behind the scenes. For example, they worked as seamstresses (女裁缝师), sewing vital spaceflight components. In fact, many of NASA’s key works would never have been possible without them. Recently Hollywood produced a movie called Hidden Figures to focus on a group of American female mathematicians, especially the black women, who helped NASA send the first American into space. But this was not women’s only contribution. Back in 1963, Soviet astronaut Valentina Tereshkova became the first woman to be sent into space. However, after that, space flight programs were slow to employ women. In the USA. NASA didn’t accept applications from women to become astronauts until 1978.
But attitudes have changed and leading officials at NASA say that the first person to set foot on Mars should be a woman. The space agency aims to have a sex-balanced workforce but can only achieve that if equal numbers of men and women are trained for science and technology jobs. As Allison McIntryre told the BBC, “My director is a woman. We have female astronauts. We haven’t put a woman on the moon yet. And I think that perhaps the first person to step on Mars should be a woman.”
1. What did Yuri Gagarin do in 1961?| A．He landed on the moon in success. |
| B．He discovered many new boundaries. |
| C．He led scientists to explore the moon. |
| D．He made the first journey into the space. |
| A．To show women are the true heroes of NASA’s first launch. |
| B．To stress that black people have won equal rights in NASA. |
| C．To prove women can do as well as men in NASA’ projects. |
| D．To present women’s contributions to NASA’s space programs. |
| A．Uncaring. | B．Disapproving. |
| C．Supportive. | D．Disappointed. |
| A．Will the First Person to Step on Mars Be a Woman? |
| B．Great Achievements Have Been Made in Space Exploration? |
| C．Why Men Played an Important Role in Exploring the Unknown? |
| D．Men and Women Have Made Equal Contributions to NASA’s Projects? |
