1 . Blind people have long desired for brightness, but scientists don’t have the technology. To bring that one step closer to reality, Zhiyong Fan, a materials scientist of the Hong Kong University of Science and Technology, developed a new artificial eye recently. The device, which is about as sensitive to light and has sharper vision and a faster reaction time than a real eyeball, may outperform human eyes.

The human eye owes its wide field of view and clear eyesight to the retina (视网膜) — an area at the back of the eyeball covered in light-detecting cells. The design for a new artificial eye is based on the structure of the human eye and uses a friendly light-sensitive material. At the back of the eyeball, an artificial retina is lined with Nan scale light sensors (纳米级光感器). Those sensors measure light that passes through the lens (晶状体) at the front of the eye. Wires attached to the back of the retina send signals from those sensors to the processor, similar to the way nerve networks connect the eyeball to the brain.

“In the future, we can use this to replace damaged human eyes,” says the lead designer. In theory, this artificial eye could see more clearly than the human eye, because the artificial retina contains about 460 million light sensors per square centimeter while a real retina has about 10 million light-detecting cells per square centimeter. Besides, the artificial eyeball records changes in lighting faster than human eyes can — within about 30 to 40 milliseconds, rather than 40 to 150 milliseconds. Although its 100-degree field of view isn’t as broad as the150 degrees a human eye can take in, the device can see as well as the human eye in poor light.

Hongrui Jiang, an electrical engineer at the University of Wisconsin, though, thinks engineers need a much more practical and efficient way to produce vast series of tiny wires on the back of the artificial eyeball to give it superhuman sight, which is super hard to achieve.

1. Why does Zhiyong Fan develop the artificial eye?

A．To replace people’s real eyeballs.	B．To gain a sharper vision.
C．To help the blind regain their eyesight.	D．To help normal eyes perform better.

2. What is paragraph 2 mainly about?

A．The design of the artificial eye.	B．The structure of the human eye.
C．The advantages of the artificial eye.	D．The material used for the artificial eye.

3. What can we learn about the artificial eye and the human eye?

A．They have the same structure.

B．The artificial eye may see more clearly.

C．The human eye sees better in weak light.

D．The artificial eye takes in a broader view.

4. Which word best describes Hongrui Jiang’s attitude to the artificial eye?

A．Doubtful.

B．Favorable.

C．Unconcerned.

D．Satisfied.

2 . UNESCO World Heritage Sites were created to celebrate and safeguard the most unique places around the world. Below are my 4 favorite UNESCO World Heritage Sites.

Cinque Terre, Italy

With cars banned here, you’ll really get to feel the unique history and character of the Cinque Terre’s five centuries-old coastal villages. The breathtaking views of harbors far below the wild coastline along with the rich colors will definitely make it a memorable holiday.

Angkor Wat, Cambodia

Angkor Wat is the world’s largest religious (宗教的) monument and it contains impressive remains from the Khmer Empire (9th to 15th century). The site has dozens of iconic temples like Ta Prohm (a magnificent temple ruin hidden in the jungle). Hosting more than two million visitors annually, this artistic masterpiece is a must-see site.

Petra, Jordan

Petra’s rock-cut architecture has contributed to its nickname, the Rose City, based on the color of the stone it was carved from. The delicate constructions of temples and tombs along with the remains of churches and temples are only a couple of reasons why this world-famous site is a must-visit destination.

Yellowstone National Park, USA

Yellowstone’s vast wilderness includes mountain ranges, lakes and waterfalls. One of the main reasons for tourists to visit Yellowstone is to observe the amazing wildlife like grizzly bear, bison, bighorn sheep wander the plains and valleys.

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1. Where can tourists enjoy beautiful harbor views?

A．In Cinque Terre.	B．In Angkor Wat.
C．In Petra.	D．In Yellowstone National Park.

2. What do Angkor Wat and Petra have in common?

A．Colorful stones.	B．Religious relics.
C．Coastal villages.	D．Amazing wildlife.

3. Where is the text probably from?

A．A news report.	B．A wildlife brochure.
C．A travel blog.	D．An economic magazine.

3 . In habitats across the planet, animals periodically drop everything to walk, fly or swim to a new place. Some animals such as whales and geese learn migration paths by following their parents. Others, including small songbirds, gain the distance and direction of their migration within their genetic code. And some animals use a combination of genetics and culture to guide their migration.

Another group of migrators does not quite fit either model, and researchers have only recently started to figure out how they find their way. The Cory’s shearwater is an oceangoing seabird that migrates over the Atlantic every year. The young do not migrate with their parents, so culture cannot explain their journeys. And the exact paths vary wildly from individual to individual, making genetics equally unlikely.

Cory’s shearwaters are long-lived, rarely producing young successfully before age nine. This leaves an opening for learning and practice to develop their migration patterns. Researchers call this the “exploration-refinement”, and until now it has been hypothetical (假设的) because of difficulties in tracking migratory animals’ movements.

But a team of researchers has done that by attaching small geolocators to more than 150 of the birds aged four to nine. They found that younger birds traveled longer distances, for longer periods, and had more diverse paths than older birds. “We finally have evidence of the ‘exploration-refinement’ for migratory birds,” says Letizia Campioni, who led the study. Younger Cory’s shearwaters are able to fly just as fast as the adults——but they do not, suggesting that the young do more exploring, which gradually fades as they mature and settle into a preferred course.

“Although it may seem less efficient than other strategies, exploration refinement could be beneficial to birds and other organisms in a rapidly changing world due to unpredictable man-made changes,” says Barbara Frei. “It might be safer to repeat a behavior that was recently successful than to rely on patterns that were perfected long ago but might no longer be safe.”

1. What is the first paragraph mainly about?

A．It describes animals’ habitats.	B．It compares different species.
C．It talks about migration models.	D．It introduces a tracking technology.

2. What does the underlined word “this” in Paragraph 3 refer to?

A．The opening for learning and practice.

B．The unique living habit of Cory’s shearwaters.

C．The process scientists track Cory’s shearwaters’ movements.

D．The way Cory’s shearwaters form their migration patterns.

3. What does Letizia’s study find about the younger Cory’s shearwaters?

A．They travel as much as adult birds.	B．They lower the speed for exploration.
C．They move in a predictable manner.	D．They look for a course with their parents.

4. What can we conclude from the last paragraph?

A．Exploration refinement contributes to birds’ adaptability.

B．Man-made changes make migration easier.

C．Animals make a safer journey via a fixed track.

D．A combination of strategies assures migration success

4 . Endangered polar bears are breeding (繁殖) with grizzly bears (灰熊), creating “pizzly” bears, which is being driven by climate change, scientists say.

As the world warms and Arctic sea ice thins, starving polar bears are being forced ever further south, where they meet grizzlies, whose ranges are expanding northwards. And with that growing contact between the two come increasing hybrids (杂交种).

With characteristics that could give the hybrids an advantage in warming northern habitats, some scientists guess that they could be here to stay. “Usually, hybrids aren’t better suited to their environments than their parents, but these hybrids are able to search for a broader range of food sources,” Larisa DeSantis, an associate professor of biological sciences at Vanderbilt University, told Live Science.

The rise of “pizzly” bears appears with polar bears’ decline: their numbers are estimated to decrease by more than 30% in the next 30 years. This sudden fall is linked partly to “pizzly” bears taking up polar bears’ ranges, where they outcompete them, but also to polar bears’ highly specialized diets.

“Polar bears mainly consumed soft foods even during the Medieval Warm Period, a previous period of rapid warming,” DeSantis said, referring to fat meals such as seals. “Although all of these starving polar bears are trying to find alternative food sources, like seabird eggs, it could be a tipping point for their survival.” Actually, the calories they gain from these sources do not balance out those they burn from searching for them. This could result in a habitat ready for the hybrids to move in and take over, leading to a loss in biodiversity if polar bears are replaced.

“We’re having massive impacts with climate change on species,” DeSantis said. “The polar bear is telling us how bad things are. In some sense, “pizzly” bears could be a sad but necessary compromise given current warming trends.”

1. Why do polar bears move further south?

A．To create hybrids.	B．To expand territory.
C．To relieve hunger.	D．To contact grizzlies.

2. What makes “pizzly” bears adapt to natural surroundings better than their parents?

A．Broader habitats.	B．More food options.
C．Climate preference.	D．Improved breeding ability.

3. What does the underlined phrase “a tipping point” in paragraph 5 refer to?

A．A rare chance.	B．A critical stage.
C．A positive factor.	D．A constant change.

4. What’s the main idea of the text?

A．Polar bears are changing diets for climate change.

B．Polar bears have already adjusted to climate change.

C．“Pizzly” bears are on the rise because of global warming.

D．“Pizzly”bears have replaced polar bears for global warming.

5 . For people suffering from depression, there’s an all-natural treatment they should use — getting more exercise. It could help fight depression, even if people have a genetic risk, new research shows.

For the study, researchers collected information from nearly 8,000 people and found those with related genes were more likely to have depression over the next two years after examining them. But that was less likely for people who were more active at the study’s start, even if they had a family history of depression. Higher levels of physical activity helped protect even those with the highest genetic risk of depression.

Both high-intensity (高强度) exercise and low-intensity activities were associated with a reduced risk of depression. Adding four hours of exercise a week could lower the risk of a new episode (一段经历) of depression by 17%, according to the study. “Our findings strongly suggest that, when it comes to depression, being physically active has the potential to remove the added risk of future episodes in individuals who are genetically risky,” said lead author Karmel Choi. “On average, about 35 additional minutes of physical activity each day may help people to reduce their risk and protect against future depression episodes.”

Depression is a common mental illness globally, with more than 264 million people affected. “Depression is so ubiquitous, and that underlines the need for effective approaches that can impact as many people as possible,” Choi said. And mental health and primary care providers can use the findings to advise patients that there’s something meaningful they can do to lower their risk of depression.

1. How did the researchers reach their conclusion?

A．By analyzing a mass of data.

B．By conducting genetic research.

C．By comparing various levels of activity.

D．By tracking the subjects for many years.

2. What does the study show about depression?

A．Physical activity betters medical treatment.

B．Exercise is able to decrease and prevent it.

C．Different levels of exercise intensity matter the same.

D．Exercising 35 minutes daily is the most effective treatment.

3. What does the underlined word “ubiquitous” in paragraph 4 mean?

A．Harmful.	B．Complex.
C．Unusual.	D．Common.

4. What is the purpose of the text?

A．To discuss a disease.

B．To introduce a method.

C．To analyze a genetic risk.

D．To explain a phenomenon.

6 . Thirteen-year-old Kaylee has a lot of friends — 532, actually, if you count up her online friends. And she spends a lot of time with them.

But is it possible that Kaylee’s online friendships could be making her lonely? That’s what some experts believe. Connecting online is a great way to stay in touch, they say. However, some experts worry that many kids are so busy connecting online that they might be missing out on true friendships.

Could this be true? During your parents’ childhoods, connecting with friends usually meant spending time with them in the flesh. Kids played Scrabble around a table, not Words With Friends on their phones. When friends missed each other, they picked up the telephone. Friends might even write letters to each other.

Today, most communication takes place online. A typical teen sends 2,000 texts a month and spends more than 44 hours per week in front of a screen. Much of this time is spent on social media platforms (平台).

In fact, in many ways, online communication can make friendships stronger, “There’s definitely a positive influence. Kids can stay in constant contact, which means they can share more of their feelings with each other,” says Katie Davis, co-author of The App Generation.

Other experts, however, warn that too much online communication can get in the way of forming deep friendships. “If we are constantly checking in with our virtual words, we will have little time for our real-world friendships.” says Larry Rosen, a professor at California State University. Rosen also worries that today’s kids might mistake the “friends” on the social media for true friends in life. However, in tough times, you don’t need someone to like your picture or share your blogs. You need someone who will keep your secrets and hold your hand. You would like to talk face to face.

1. What is the purpose of the first paragraph?

A．To summarize the text.	B．To tell about true friends.
C．To bring up a discussion.	D．To encourage online friendship.

2. What does the underlined part “in the flesh” mean in Paragraph 3?

A．In person.

B．In advance.

C．In any case.

D．In full measure.

3. What is Katie’s attitude towards online communication?

A．Worried.

B．Positive.

C．Confused.

D．Unconcerned.

4. What view does Rosen hold?

A．It’s wise to turn to friends online.

B．It’s easier to develop friendships in reality.

C．Social media help people stay closely connected.

D．Teenagers need focus on real-world friendships.

7 . Snowboarding genius Su Yiming made a name for himself by winning China’s first Olympic gold in the sport on Tuesday. By cleanly stomping back-to-back 1800 tricks, the teenager landed the biggest prize so far in his young career—gold in the men’s Big Air at the Beijing Winter Olympics. The notable achievement realized a childhood dream to reach the peak of the sport, which he began to learn at the age of 4.

Now with two shinning medals hung around his neck, the 17-year-old described his superb Olympic debut ( 首秀) as an unbelievable experience that has made all his sacrifices worthwhile. “This feels so surreal that I’ve finally accomplished what I’ve dreamed of since I was little,” said an emotional Su.

Over the past four years, Su has combined his talent with hard work to produce one of the swiftest rises to prominence the sport has ever seen. When the Shougang Big Air venue hosted its first international event, Su was an unknown qualifier, who didn’t even make the final runs. Just over two years later, Su is the name on everyone’s lips at the venue’s Olympic debut—drawing the whole nation’s attention to the sport he loves.

“The biggest motivation (动力) for me is my love for snowboarding,” Su said, when asked about the secret to his success. “In snowboarding, I feel like I can show my own style and creativity. Every time I ride my board, it’s always a joyful moment. I hope through my experience, I can inspire more young people to get interested in the sport.”

Su, a former child actor who featured in action movies, said the Olympic gold will encourage him to seek for more breakthroughs—even beyond his athletic career. “I enjoy snowboarding just as much as I enjoy acting,” said Su, who turns 18 on Friday. “I think I still have a lot of possibilities to explore in my future career either in snowboarding or in acting. But now I just want to enjoy the moment and celebrate it as the best possible birthday gift.”

1. What does the underlined word “landed” in Paragraph 1 mean?

A．Arrived.

B．Gained.

C．Created.

D．Dreamed.

2. According to Su himself, what is his secret to his success?

A．His acting experience.	B．His talent and hard work.
C．His being fond of snowboarding.	D．His life dream of achieving success.

3. Which of the following words can best describe Su?

A．Talented and thoughtful.	B．Lovely and famous.
C．Creative and kind-hearted.	D．Hard-working and devoted.

4. What’s Su’s attitude toward his future?

A．Upset.

B．Hopeful.

C．Anxious.

D．Satisfied.

8 . Earth is far more alive than we previously thought, according to “deep life” studies that reveal a rich underground ecosystem beneath our feet that is almost twice the size of all the world’s oceans. Despite extreme heat, no light and intense pressure, scientists estimate it has between 15 billion and 23 billion tonnes of microorganisms. “It’s like finding a whole new reservoir (储藏) of life on Earth,” said Karen Lloyd an associate professor at the University of Tennessee.

Results suggest 70 percent of Earth’s bacteria and archaea exist in the subsurface. One organism found 2.5 kilometers below the surface has been buried for millions of years and may not rely at all on energy from the sun. Also, the methanogen (产甲烷菌) has found a way to create methane in this environment, which the methanogen may not use to reproduce or divide, but use to replace or repair broken parts. Lengths of their lives were completely different. Some microorganisms have been alive for thousands of years, barely moving except with shifts in earthquakes or eruptions. They’re just active inside, with less energy than people thought possible to support life.

The team consists of 1,200 scientists from 52 countries in disciplines ranging from geology and microbiology to chemistry and physics. A year before the conclusion of their study, they will present the findings before the American Geophysical Union’s annual meeting opens this week, which they say are made possible by technical advances on drills and microscopes.

The scientists have been wondering about the point beyond which life cannot exist, but the deeper they dig, the more life they find. There is a temperature maximum—currently 122℃—but they believe this record will be broken if they keep exploring and developing more advanced instruments.

Questions remain, including how the microbes interact with chemical processes, and what this might reveal about how life and Earth coevolved.

1. What do the scientists find about the underground organisms?

A．They can’t reproduce and divide.	B．They’re the oldest living things.
C．Some of them consume no energy.	D．Some of them almost always keep still.

2. What can we learn about the research from paragraph 3?

A．It last for around one year.	B．It involves efforts from many fields.
C．It promotes technical development.	D．It is conducted in 52 countries.

3. Why does the scientists dig deep?

A．To break their previous record.

B．To find the depth limit of life.

C．To discover more ancient microorganisms.

D．To measure the highest subsurface temperature.

4. Which of the following can be the best title?

A．Earth Depths Are Full of Life.

B．Organisms Live Better Underground.

C．Earth Is Fat Beyond Human Exploration.

D．Subsurface Life Differs from That on Land.

9 . I live in Xizhou in Yunnan Province, on the historic Tea Horse Road. I have to admit that when I first heard that Paul Salopek was going to walk the entire globe on his own two feet, I was blown away. I couldn’t imagine that there could be such an unusual person in the world.

Last May, I met Paul. He told me that it was his first time in China. He talked to me with great excitement about the history, migrations, and discoveries in my region of China. He spoke of the Shu-Yandu Dao (the Southern Silk Road), the travels of the 17th-century Chinese explorer Xu Xiake, the Tea Horse Road and the early 20th-century American botanist Joseph Rock. He also talked of Xuanzang. Paul considered many of them heroes and in a sense Chinese pioneers of slow journalism.

I decided to accompany Paul on his walk toward Yunnan. On September 28, 2021, we set out. Our days were simple: walk, eat, sleep, and repeat. We woke up at sunrise, set off in high spirits, and rested at sunset, dragging ourselves into exhausted sleep.

We met many people on the road. Some were curious, surrounding us and watching us; some gave us directions; some invited us into their home to take a rest; some spoke of the charm of their hometown. We met many beautiful souls, simple souls and warm souls. We were walking with our minds.

Together, we were impressed by the biodiversity of the Gaoligong Mountains. As I walked on ancient paths through mountains, I seemed to hear the antique voices of past travelers urging me to be careful on the road.

Looking back on the more than 200 miles I walked with Paul, I came to a realization. Walking for its own sake, while healthy and admirable, is only a small part of the benefit of moving with our feet. A deeper reward is rediscovering the world around us, shortening the distance between each other, and sharing each other’s cultures.

1. How did the writer first respond to Paul’s travel plan?

A．Scared.	B．Puzzled.
C．Disappointed.	D．Surprised.

2. What can we learn about Paul Salopek from paragraph 2?

A．He was a western journalist.	B．He had a knowledge of China.
C．He came to China several times.	D．He was Joseph Rock’s acquaintance.

3. What does paragraph 4 tell us about the writer and Paul?

A．They honored the ancestors.	B．They set off in high spirits.
C．They satisfied the locals’ curiosity.	D．They built bonds with people.

4. What is the main purpose of the writer’s writing the text?

A．To share and reflect on a journey.	B．To suggest a new way of travel.
C．To advocate protection of biodiversity.	D．To introduce and promote Chinese culture.

10 . A new study in the journal of Tourism Analysis shows frequent travelers are happier with their lives than people who don’t travel at all.

Chun-Chu Chen, an assistant professor at Washington State University, conducted a survey to find out why some individuals travel more frequently than others and whether or not travel and tourism experiences have a lasting effect on happiness and wellness.

The results of his analysis show individuals who pay more attention to tourism-related information and frequently discuss their travel plans with friends are more likely to go on regular vacations than those who aren’t constantly thinking about their next trip. Additionally, participants in the survey who reported regularly traveling at least 75 miles away from home also reported being about 7% happier when asked about their overall well-being than those who reported traveling very rarely or not at all.

“While things like work, family life and friends play a bigger role in overall reports of well-being. The accumulation (积累) of travel experiences’ does appear to have a small yet noticeable effect on self-reported life satisfaction,” Chen said.

Participants in the study were asked about the importance of travel in their lives, how much time they spent looking into and planning future vacations, and how many trips they went on over a year. They were also asked about their life satisfaction. Out of the 500 survey participants, a little over half reported going on more than four pleasurable trips a year. Only 7% of respondents did not take any vacations.

As travel restrictions (限制) due to COVID-19 pandemic begin to relax in the future, the research could have important effects on both tourists and the tourism industry. Based on the results of the study, Chen said travel companies, resorts and even airlines, could launch social media campaigns, such as creating signs about the scientific benefits of vacation, to spark people’s interest in discussing their opinions about travel.

1. What is the benefit of frequent travelling according to the study?

A．Getting more tourism information.	B．Making more friends.
C．Bettering tourism industry.	D．Improving one’s well-being.

2. What does Paragraph 5 mainly talk about?

A．Why the professor carried out the study.

B．How the participants felt about the survey.

C．What the participants were interviewed about.

D．What the participants panned to do in the future.

3. What can we infer from the last paragraph?

A．Tourism industry should improve their service.

B．The results of the study will benefit tourism industry.

C．COVID-19 pandemic will be more serious in the future.

D．People will live a happier life after COVID-19 pandemic.

4. Which of the following can be the best title for the text?

A．Travel more and be happier	B．Make good use of travelling
C．Prepare for the tourism development	D．Make travel plans with friends