1 . Kemira Boyd had just jumped in the shower when she heard her stepmother, Tammy Boyd, knocking on the door. Kemira's 12-day-old daughter Ryleigh was choking. Kemira tried everything, but she still couldn't breathe. Kemira knew Ryleigh needed to get to the hospital fast.
They had barely driven out of their neighborhood when a police car appeared behind them. Deputy Will Kimbro figured that the speeding driver was either too distracted to notice him or unconcerned. Kimbro soon found out it was a frightening combination of the two.
Once she'd pulled over, Kemira handed the baby to Kimbro. He put a hand on her little chest. Ryleigh's heart was barely beating. Kimbro radioed for an ambulance. At that time Ryleigh's lips were already blue.
The fact that Kimbro was there was a miracle. He had recently completed a CPR class and knew how to treat a child.
“Although I was shocked, my training kicked in, and I went to work to keep that child alive,” said Kimbro. Then he began tapping Ryleigh's chest, hoping to press her heart back into action. Thanks to the CPR class, Kimbro knew the choking child didn't have a chance if there was a blockage, and he used one finger to clear her airway. That was a magic touch. 20 seconds later, Ryleigh began to cry. “If she's crying like that, she's breathing,” said Kimbro.
But they still had five more minutes until the ambulance would arrive, and Kimbro worried that Ryleigh would choke again. He continued with delicate chest compression and clearing her airway.
After transferring Ryleigh to the ambulance, Kimbro drove away. At the hospital, Ryleigh recovered quickly thanks to a determined police officer who was in the right place at the right time.
1. Why did Kemira stop her car outside her neighborhood?| A．She wanted to ask for help. | B．She had broken traffic rules |
| C．She needed to care for the child. | D．She planned to talk with Kimbro |
| A．Nervous. | B．Frightened. | C．Calm. | D．Curious. |
| A．The CPR class. | B．The doctors' help. |
| C．Kemira's reaction. | D．Kimbro's first aid. |
| A．An encounter saved a life | B．A CPR class is important |
| C．A clever and brave mother | D．A policeman's experience |
2 . When you think of the Himalayas, you may picture tall, rocky, snow-covered peaks. But that’s not true.
The subnival (亚冰雪的) region is the zone between the treeline and the snowline. It is 5 to 5 times as large as the areas of glaciers and permanent snow, which means studying it is vital to understanding the Himalayas as a whole.
The treeline is the edge of an ecosystem where trees are able to grow, and beyond the treeline environmental conditions become too tough to allow tree growth. Meanwhile, snowlines are the boundaries on mountains that separate areas with permanent snow (where snow is present for the majority of the year) from areas with seasonal or no snow.
Researchers used satellite data from 1993 to 2018 to measure plant cover between 4,150 meters and 6,000 meters above sea level. The scientists discovered that the greatest increase in plant cover was between an altitude of 5,000 meters and 5,500 meters. Subnival plants mostly include small shrubs and grasses.
Even areas once completely occupied by glaciers now hold rocks covered with mosses, lichen, and sometimes even flowers. In addition, the snowline seems to be retreating, while the treeline is expanding. This shows that the region is becoming warmer, causing more melting of snow and allowing vegetation to move up in height.
In the past 40 years, 25% of all Himalayan ice has been lost due to global warming. Himalayan glaciers are reducing by about 0.5 meters each year. The rate of glacier melting has doubled in this decade. The melting of glaciers increases water in the region, making it wetter. Receding snow also forces the snowline to move up, providing a greater amount of area for the warm and moist conditions, which are perfect for vegetation growth.
As of now, we do not know whether vegetation will accelerate or slow down the rate of glacier melting.
1. How does the writer develop the third paragraph?| A．By explaining concepts. | B．By providing some examples. |
| C．By analyzing causes and effects. | D．By listing specific data. |
| A．Disappearing. | B．Lengthening. | C．Withdrawing. | D．Widening. |
| A．The snowline moves up. | B．Glaciers are melting faster. |
| C．The subnival area is wetter. | D．Plants grow much better. |
| A．The climate of the Himalayas is changing. | B．Icebergs in the Himalayas have disappeared. |
| C．Plants are diverse in the Himalayas. | D．Plant life spreads in the Himalayas. |
3 . Happiness is not a warm phone, according to a new study exploring the link between young life satisfaction and screen time. The study was led by professor of psychology Jean M. Twenge at San Diego State University (SDSU).
To research this link, Twenge, along with colleagues Gabrielle Martin at SDSU and W. Keith Campbell at the University of Georgia, dealt with data from the Monitoring the Future (MtF) study, a nationally representative survey of more than a million U. S. 8th-, 10th-, and 12th-graders. The survey asked students questions about how often they spent time on their Phones, tablets and computers, as well as questions about their face-to-face social interactions and their overall happiness.
On average found that teens who spent more time in front of screen devices — playing computer games, using social media, texting and video chatting — were less happy than those who invested more time in non-screen activities like sports, reading newspapers and magazines, and face-to-face social interactions.
"The key to digital media use and happiness is limited use," Twenge said. "Aim to spend no more than two hours a day on digital media, and try to increase the amount of time you spend seeing friends face-to-face and exercising — two activities reliably linked to greater happiness."
Looking at historical trends from the same age groups since the 1990s, it's easy to find that the increase of screen devices over time happened at the same time as a general drop-off in reported happiness in U. S. teens. Specifically, young peopled life satisfaction and happiness declined sharply after 2012. That's the year when the percentage of Americans who owned a smartphone rose above 50 percent. By far the largest change in teens' lives between 2012 and 2016 was the increase in the amount of time they spent on digital media, and the following decline in in-person social activities and sleep.
1. Which method did Twenge's team use for the study?| A．Calculating students' happiness. |
| B．Asking students certain questions. |
| C．Analyzing data from a survey. |
| D．Doing experiments on screen time. |
| A．By making a comparison. |
| B．By giving an example. |
| C．By making an argument. |
| D．By introducing a concept. |
| A．To draw a conclusion from the study. |
| B．To offer some advice to the readers. |
| C．To prove social activities' importance. |
| D．To support the researchers' finding. |
| A．Quitting Phones Equals Happiness |
| B．Screen Time Should Be Banned |
| C．Teens' Lives Have Changed Sharply |
| D．Screen-addicted Teens Are Unhappier |
4 . Ian McKenna was in third grade when he learned that many kids at his Austin school weren't getting enough to eat at home. He wanted to help, but local volunteer organizations turned him away, saying he was too young. So he decided to find his own solution. For years, he had been gardening with his mother, and they often distributed their extra vegetables to the neighbors. “Why not give the produce to a soup kitchen? Then I thought, I'm good at gardening," says McKenna, now 16. “Why not plant a garden at school, so that kids in need could take food home?"
McKenna persuaded his school to set aside space for a garden; then he asked the community for donations of seeds and equipment. Other students donated their time. Within months, McKenna's garden was producing lettuces, tomatoes, cucumbers and squash for students and their families. Now, seven years later, McKenna's Giving Garden project has expanded to five area schools in addition to his own backyard garden, and he has provided organic produce, enough for 25,000 meals, for Austin families.
For most of his gardening activities, McKenna wears the same T-shirt in different colors, with his personal motto on it: BE A GOOD HUMAN. To him, that means helping in any way you can, no matter what your age. "Even a smile might change someone's life," he says. “It lets them know that they are important. It can make their day."
When COVID-19 hit the U.S., McKenna redoubled his efforts, cooking up to 100 meals to distribute to the hungry on the weekends. When social distancing meant that volunteers couldn't work on community garden plots, he started offering online classes and a gardening hotline so families could grow at home. While gardening is his core focus, McKenna says he is always looking for new ways to help the hungry.
1. What caused Ian's decision to help the kids in his own way?| A．Being rejected by volunteer groups. | B．Being good at gardening. |
| C．A soup kitchen's support. | D．His mother's suggestions. |
| A．It helps students only. | B．It was started with joint efforts. |
| C．It is funded by schools. | D．It earns great profits every year. |
| A．Where there is a will, there is a way. | B．A small gesture makes a difference. |
| C．One good turn deserves another. | D．Love can break all the barriers. |
| A．Ian McKenna, Growing a Food Bank |
| B．Ian Mckenna, an Experienced Gardener |
| C．Giving Garden Project, an Impossible Mission |
| D．Giving Garden Project, a Universal Solution |
5 . Last summer, Maria and her mother moved from their house in the countryside to a flat building in Chicago.Maria really liked some things about the city, but she missed her house and yard in the countryside.
One day, Maria was in her flat building when she noticed her neighbor, Mrs.Garcia, carrying a gardening tool and a bag of soil.Maria wondered how Mrs.Garcia was able to garden in the city.
“My mom used to grow the most delicious vegetables, and I know she misses her garden now that we don't have a yard, ”said Maria.
Mrs.Garcia laughed.“I'll show you, ”she said.
Maria thought that Mrs.Garcia would take her to the park, but she took her to the roof (屋顶). When the door opened, Maria was surprised to see rows of flowers and vegetables on the roof.
“What a wonderful garden！”said Maria.
Mrs.Garcia told Maria that for a long time the roof was just an empty space.Then some of the people in the building asked the owners to turn it into a community garden.The building owners liked the idea because the plants not only helped to keep the air clean, but they also helped to keep the building cooler during warmer weather.
“I plant flowers in my own place, ”Mrs.Garcia said, “but you would be surprised by how different the plants are up here.Some people grow vegetables just like your mom.You can do some of the same things in the city as in the countryside.You just have to be creative！”
1. When did Maria and her mother move to a flat building in Chicago?| A．Last month. | B．Last winter. |
| C．Last summer. | D．Last week. |
| A．The park. |
| B．The roof. |
| C．The garden in front of her house. |
| D．The countryside. |
| A．It used the empty space well. |
| B．It helped keep the air clean. |
| C．It helped keep the building cooler. |
| D．It made the building stronger. |
| A．A Creative Lady | B．A Rooftop Garden |
| C．An Empty Roof | D．A Special Building |
6 . Think about all those successful people in your life that you know. How many of them build their success overnight? How many of them didn’t care about their goals? How many of them gave up after the first failure?
Most of the people we know to be successful were very persistent and devoted to their dreams. In other words, they work hard towards their dreams and keep trying, even if their goals aren’t easy to achieve. They didn’t give up just because they faced barriers and problems. They might even get encouraged by them.
Persistence really matters. It can help build your character. Nothing builds your character more than overcoming failures and problems in life. You get tougher and can handle anything life might throw at you. Each time you win your urge to give up, you make your mind and personality a bit stronger. Each of those wins will build your character to be healthier and to handle more stress.
When you are committed to something, you are willing to learn what it takes to be successful. You will be required to learn new skills and solve new kinds of problems. When you are persistent about your goals, you will have to learn new ways of doing things. Sometimes you might notice that to solve a particular problem, you need to learn more about it. When you study more about the topic, you discover new exciting subtopics to know about. As you think more in-depth into that problem, you will be exposed to new ideas and thoughts. Persistence is the driver behind your ability to learn what you need to know.
When you keep building your persistence and willpower, you will face many failures. Things don’t always end up as you have planned. With persistence, you will learn how to solve those problems and get back up after a failure. You will learn that failure is not the end of the world. Life goes on, and so can you. Each time you decide to overcome your failure, you will learn something new, and you will be a bit stronger than before. Those changes won’t show daily, but slowly they will start to stack up. If you look back and analyze your process, you will discover that you handle the stressful situation more efficiently, and after failures, you won’t go into despair. You rather know how to handle each failure as you have accumulated experiences from them and handle challenging situations.
Persistence is a basic quality to develop in life because it is closely related to personal development and improvement. As you already know, it is not easy, but it is worthy of your effort.
1. The underlined word “them” in Paragraph refers to________.| A．dreams | B．successful men | C．most of the people | D．barriers and problems |
| A．Persistence builds your character. |
| B．Persistence teaches you how to manage failures. |
| C．Persistence improves your skills and abilities. |
| D．Persistence helps you handle a stressful situation. |
| A．People with persistence seldom suffer from failures. |
| B．Learning new skills will make you more persistent. |
| C．Persistent people are easier to get out of a bad mood. |
| D．Successful people usually have stronger personalities. |
| A．explain the importance of being persistent | B．analyze the character of successful people |
| C．offer some suggestions about being persistent | D．show how to deal with problems and face failures |
7 . In the 2006 film version of The Devil Wears Prada, Miranda Priestly, played by Meryl Streep, scolds her unattractive assistant for imagining that high fashion doesn’t affect her, Priestly explains how the deep blue color of the assistant’s sweater descended over the years from fashion shows to departments stores and to the bargain bin in which the poor girl doubtless found her garment.
This top-down conception of the fashion business couldn’t be more out of date or at odds with the feverish world described in Overdressed, Elizabeth Cline’s three-year indictment of “fast fashion”. In the last decade or so, advances in technology have allowed mass-market labels such as Zara, H&M, and Uniqlo to react to trends more quickly and anticipate demand more precisely. Quicker turnarounds mean less wasted inventory, more frequent release, and more profit. These labels encourage style-conscious consumers to see clothes as disposable-meant to last only a wash or two, although they don’t advertise that-and to renew their wardrobe every few weeks. By offering on-trend items at dirt-cheap prices, Cline argues, these brands have hijacked fashion cycles, shaking an industry long accustomed to a seasonal pace.
The victims of this revolution, of course, are not limited to designers. For H&M to offer a $5.95 knit miniskirt in all its 2,300-plus stores around the world, it must rely on low-wage overseas labor, order in volumes that strain natural resources, and use massive amounts of harmful chemicals.
Overdressed is the fashion world’s answer to consumer-activist bestsellers like Michael Pollan’s The Omnivore’s Dilemma. “Mass-produced clothing, like fast food, fills a hunger and need, yet is non-durable and wasteful,” Cline argues. Americans, she finds, buy roughly 20 billion garments a year—about 64 items per person—and no matter how much they give away, this excess leads to waste.
Towards the end of Overdressed, Cline introduced her ideal, a Brooklyn woman named Sarah Kate Beaumont, who since 2008 has made all of her own clothes-and beautifully. But as Cline is the first to note, it took Beaumont decades to perfect her craft; her example can’t be knocked off.
Though several fast-fashion companies have made efforts to curb their impact on labor and the environment—including H&M, with its green Conscious Collection line—Cline believes lasting change can only be affected by the customer. She exhibits the idealism common to many advocates of sustainability, be it in food or in energy. Vanity is a constant; people will only start shopping more sustainably when they can’t afford not to.
1. Priestly criticizes her assistant for her _____________.| A．poor bargaining skill. | B．insensitivity to fashion. |
| C．obsession with high fashion. | D．lack of imagination. |
| A．accusation. | B．enthusiasm. | C．indifference. | D．tolerance. |
| A．Vanity has more often been found in idealists. |
| B．The fast-fashion industry ignores sustainability. |
| C．People are more interested in unaffordable garments. |
| D．Pricing is vital to environment-friendly purchasing. |
| A．Satire on an extravagant lifestyle. | B．Challenge to a high-fashion myth. |
| C．Criticism of the fast-fashion industry. | D．Exposure of a mass-market secret. |
8 . Japanese officials say they are pleased with the quality of the asteroid (小行星) material collected by a spacecraft and returned to Earth.
Last week, officials from Japan described the samples (样品), which were collected from the Ryugu asteroid in July 2019. Ryugu sits more than 300 million kilometers from Earth. Japan’s unpiloted Hayabusa2 spacecraft removed the material after making a hole into the asteroid.
The space agency said the July 2019 mission (任务) aimed to collect samples from below the surface of Ryugu. During an earlier operation in February 2019, Hayabusa2 collected material from a different part of the asteroid. The second collection effort resulted in sample pieces as big as 1 centimeter. The black material looked similar to charcoal and was very hard. It did not break apart when picked up or poured into another container.
Earlier this month, space officials described the samples Hayabusa2 removed on its first mission as smaller, sandy pieces. They were collected from the surface of Ryugu. Hayabusa2 was launched in December 2014 and arived near Ryugu in June 2018. The Japanese space mission aims to use the samples to learn more about how our solar system formed.
To get the second set of samples in July, Hayabusa2 used an impactor to knock the asteroid’s surface. The aim was to collect material unaffected by space radiation or other environmental conditions. The size differences suggest different hardness of the bedrock of the asteroid. One possibility is that the place of the second touchdown was a hard bedrock and larger particles broke and entered the container.
Hayabusa2 is now on another mission to a smaller asteroid, called 1998KY26. The Japanese government expects the aircraft to take 11 years to reach that asteroid. Hayabusa2’s new mission aims to study possible ways to prevent large meteorites (陨石) from hitting Earth.
1. What are these asteroid materials used to do?| A．Study how the solar system was born. | B．Determine the movement of asteroids. |
| C．Study the environment on the asteroid. | D．Uncover when the asteroid was formed. |
| A．To discover new planets. | B．To fetch more materials in space. |
| C．To travel around the solar system. | D．To explore ways to protect the earth. |
| A．They were collected in the same place. | B．They both were black and hard. |
| C．They came in different shapes. | D．They were of equal weight. |
| A．Japan Makes Progress in Studying Solar System |
| B．Japan Is Pleased with Latest Asteroid Samples |
| C．The Secret of an Asteroid Comes to Light |
| D．The Earth Faces Threats from Space |
9 . As COVID-19 hit and the world went into varying levels of lockdown (封锁), it became difficult for researchers to know what was happening in the ocean. But now, you can join the eOceans platform to help researchers gather data on oceans and ocean ecosystems in real-time.
Downloading the eOceans app on your smartphone and logging what you see when you are on the coast or in the ocean, including any animals, people, pollution or even an empty beach, you can help researchers monitor the world’s oceans. The app lets you note your observations as well as upload photos. This information is then linked to your geographical location and is made accessible to scientists studying that region. Using eOceans data, researchers can remotely monitor how oceans and coastal communities worldwide are happening, including in the context of the pandemic (疫情).
In reality, observations recorded through eOceans are already providing valuable insights. During Australia’s lockdown, for example, the largest group of turtles in the country’s history was spotted by researchers using eOceans data. And in Hawaii, data from the app suggests that clearer waters are associated with a reduction in tourists during the pandemic.
Negative impacts of the pandemic on the ocean have also been picked up through the app, including an increase in pollution from personal protective equipment, as well as pandemic-related interruptions to marine (海洋的) recovery following a 2019 oil leak in Brazilian waters. In future, data from eOceans could help enable early detection of hazards (危害), such as oil leaks, so that they can be dealt with sooner, says Christine Ward-Paige, founder and chief scientist at eOceans.
“Till now, more than 1,000 people have already joined the eOceans platform,” says Ward-Paige. “But more data on wild life spotted along coastlines, as well as information on how people are using these spaces, are still needed.”
1. How can people help researchers monitor the ocean through the eOceans platform?| A．By downloading and observing some data of hazards. |
| B．By spotting and marking the previous marine recovery. |
| C．By collecting and uploading timely oceanic information. |
| D．By detecting and reporting your present geographical location. |
| A．An oil leak occurring in Australian waters. |
| B．The largest turtle found in Australia’s history. |
| C．A factor contributing to clearer waters in Hawaii. |
| D．A boom of tourism appearing during the pandemic. |
| A．Indifferent. | B．Optimistic. |
| C．Doubtful. | D．Anxious. |
| A．Keeping an eye on the ocean. | B．Caring about the ocean pollution. |
| C．Showing love to coastal creatures. | D．Monitoring the quality of seawater. |
10 . 
A group of researchers led by Patrick Yu-Wai-Man. an ophthalmologist (眼科医师) at Cambridge University, investigated a new genetic therapy for a form of blindness. Officially, their study was a failure. But it was also a great success, for 29 of the 37 participants reported big improvements in their vision.
The disease in question is Leber Hereditary Optic Neuropathy (LHON)(遗传性视神经病变) .A defective gene leads to sudden and rapid loss of sight, with many sufferers becoming legally blind within a year. It affects between one in 30,000 and one in 50,000 people. Men in their 20s and 30s are particularly at high risk. Since most cases are caused by a mutation (突变) in a single gene, LHON is a good candidate for gene therapy, a form of genetic engineering which aims to replace the defective gene with a working one.
With that in mind. Dr Yu-Wai-Man and his colleagues loaded up a changed virus with a corrected copy of the gene and injected it into their patients' eyes. The researchers controlled the experiment by injecting only one of each patient's eyes--chosen at random--with the virus. The other eye was given a fake injection. Using two eyes in the same patient makes for a perfect control.
The surprise came several months later. The researchers had hoped to see a big improvement in the treated eyes, compared with the untreated ones. They did not, for which the study failed in its primary objective. Instead, in more than three quarters of their patients, they saw significant improvements in both eyes.
On the face of it, that was odd. Only one eye had received the treatment, after all. Follow-up studies in monkeys confirmed what the researchers had suspected. The virus, it seemed, had found a way to travel from one eye to the other, probably via the optic nerve. Tissues and fluids samples from monkeys given the same treatment as the human patients showed viral DNA in both eyes, not just one.
Although it had a happy outcome in this case, the prospect of a gene-therapy virus travelling to places it is not intended to go to might worry regulators. Fortunately, the researchers found no trace of the virus elsewhere in the monkeys’ bodies. And. though the study was technically a failure, its practical success means that an effective treatment for LHON may at last be in reach.
1. LHON is chosen in this study because it________| A．can be easily cured |
| B．affects young males mostly |
| C．is a common disease among people |
| D．results from a mutation in a single gene |
| A．Some participants suffered loss of sight |
| B．The vision of both eyes improved greatly |
| C．All the participants gave positive feedback |
| D．The virus didn’t replace the damaged gene |
| A．confirm the virus travels across eyes |
| B．prove the virus can affect other body parts |
| C．show the effect of the treatment on animals |
| D．highlight regulators' worry about gene-therapy |
| A．The Future of Gene Therapy |
| B．The Blessing for Eye Patients |
| C．Gene Therapy: Eyeball to Eyeball |
| D．Virus Treatment: From Humans to Monkeys |
