1 . Most people can't wait for spring to arrive. It means flowers and warmer weather, all welcome changes from the dark winter days. Now we know that spring is arriving sooner in the Northern Hemisphere (北半球）than it was in the past, thanks to a study published in Scientific Reports.
For example, Los Angeles may experience spring only a day earlier than it did 10 years ago, but further north, in Seattle or Chicago, spring will arrive four days earlier. If you lived in the Arctic, spring could arrive 16 days earlier than it used to.
To determine how springtime is starting earlier, researchers looked at temperature records and 743 earlier studies over 86 years. These studies were about various biological indicators of spring, including birds migrating, plants flowering and amphibians（两栖动物）sounding their mating calls. Researchers then studied these data to see if they were occurring earlier. The result showed that not only is spring making itself known sooner but it's warmer, too.
Before you go out in a happy springtime hike, spring arriving sooner isn't so good. The livelihood of migratory birds, for instance, may be concerned.
“The food that birds rely on when they move to the north might not be reliable if the beginning of spring at these higher latitudes（维度）is expanded by future warming." said Eric Post. He is a fellow of the John Muir Institute and a polar ecologist.
Animals relying on Arctic sea ice, like polar bears, probably aren't crazy about things warming up sooner, either, because it impacts on their ability to hunt. Spring's early arrival could cause disorder in the delicate balance of various ecosystems~~not to mention how soon you'll need to buy allergy medicine.
1. We learn from the study published in Scientific Reports that.| A．spring comes earliest in Los Angeles |
| B．Los Angeles is further north than Seattle |
| C．spring comes 12 days earlier in Arctic than in Chicago |
| D．the further north a place lies, the sooner spring comes than before |
| A．comparing related data available |
| B．conducting research and test |
| C．calculating the exact length of each spring |
| D．observing animal's behavior all year round |
| A．Concerns over spring's early arrival. |
| B．Springtime emergence of creatures. |
| C．Early springtime's impacts on humans. |
| D．Disorder in the balance of ecosystems. |
| A．Medical Report. | B．Survival Stories. |
| C．Scientific Discoveries. | D．Natural environment |
2 . Dragon Head Raising Day: time for a haircut
China is a country with many colorful days and festivals. The Dragon Head Raising Day (Longtaitou) is one of them.
This special day is on the second day of the second month in the Chinese lunar calendar (阴历). It stands for (代表) the start of spring and farming. This year, the day fell on March 10.
The dragon is important in Chinese culture. We Chinese people call ourselves the “descendants (传人) of the dragon”. Therefore, people celebrate theDragon Head Raising Day with many customs about dragons.
On the day in ancient times, people put ashes (灰) in the kitchen. This was to “lead the dragon into the house”. People believed that with the help of the dragon, they could have a good harvest (收成) in autumn.
Also, people eat special foods on that day. The foods are usually named after dragons. For example, people eat “dragon whisker (细须)” noodles and dumplings called “dragon teeth”.
Today, many customs have faded away (消退). But one that has remained is the cutting of hair. It was said that a haircut during the first lunar month may bring bad luck to the mother’s brothers. So many people have their hair cut on the Dragon Head Raising Day.
1. The Dragon Head Raising Day is one of the ______ festivals.| A．English | B．French | C．American | D．Chinese |
| A．March 10 | B．February 2 | C．March 4 | D．March 8 |
| A．Because the dragon liked the ashes. |
| B．Because the ashes led the dragon into the house. |
| C．Because the ashes stood for the harvest. |
| D．Because the ashes could bring good luck. |
| A．the dragon boating | B．to eat Zongzi |
| C．the cutting of hair | D．to eat mooncakes |
3 . In between all the measures to battle the severe air pollution in Delhi, India, there’s one more option — a bar that has “pure air”.
Founded by Aryavir Kumar, Oxy Pure, Delhi’s first-ever oxygen bar, offers 15 minutes of 80-90 percent pure oxygen, costing Rs 299 ($4.2). Customers are given a lightweight tube for oxygen intake. The device (装置) is placed near the customer’s nostrils (鼻孔) through which they are advised to breathe in the oxygen.
The bar also offers its customers several aromas (气味) to go with oxygen, including lemongrass, cherry and more. According to the aroma people choose, each session promises to improve sleep patterns and digestion, cure headaches, and even claims to work as a treatment for depression.
Bonny Irengbam, a senior sales assistant at the bar, said, “Some people, who try it for the first time, will feel relaxed and fresh. But only people who do this regularly will get real benefits. By regularly, I mean once or twice a month. We don’t encourage back-to-back sessions, as increased levels of oxygen in the body can make a person dizzy.”
Dr. Rajesh Chawla, a senior doctor at the Indraprastha Apollo Hospital, said, “Even if you breathe in the so-called pure oxygen for two hours in a day, you will go back to breathing the polluted air for the rest of the 22 hours. The concept is purely money-driven.”
Recalling the first few months of the bar, Irengbam admitted that people were sceptical. “Many people criticised, saying we were selling air. Others were simply scared to breathe through the tube.”
Irengbam said the bar saw a significant rise in the number of customers two to three days after Diwali, an Indian festival mainly celebrated by fireworks and lights, as the pollution levels were high.
1. What do we know about the oxygen intake?| A．It surely has a promising future. | B．It will always cause side effects. |
| C．It was not well received at first. | D．It can cure people of depression. |
| A．Once-a-month. | B．Once-in-a-while. |
| C．Once-and-for-all. | D．One-after-another. |
| A．Doubtful. | B．Favorable. | C．Unconcerned. | D．Unclear. |
| A．To explain how to breathe in the oxygen. |
| B．To introduce the first oxygen bar in India. |
| C．To show people’s responses to the device. |
| D．To advertise for Aryavir Kumar’s business. |
4 . In May 1987 the Golden Gate Bridge had a 50th birthday party. The bridge was closed to motor traffic so people could enjoy a walk across it. Organizers expected perhaps 50,000 people to show up. Instead, as many as 800, 000 crowded the roads to the bridge. By the time 250,000 were on the bridge, engineers noticed something terrible：the roadway was flattening under what turned out to be the heaviest load it had ever been asked to carry. Worse, it was beginning to sway（晃动）. The authorities closed access to the bridge and tens of thousands of people made their way back to land. A disaster was avoided.
The story is one of scores in To Forgive Design：Understanding Failure, a book that is at once a love letter to engineering and a paean（赞歌）to its breakdowns. Its author, Dr. Henry Petroski, has long been writing about disasters. In this book, he includes the loss of the space shuttles（航天飞机）Challenger and Columbia, and the sinking of the Titanic.
Though he acknowledges that engineering works can fail because the person who thought them up or engineered them simply got things wrong, in this book Dr. Petroski widens his view to consider the larger context in which such failures occur. Sometimes devices fail because a good design is constructed with low quality materials incompetently applied. Or perhaps a design works so well it is adopted elsewhere again and again, with seemingly harmless improvements, until, suddenly, it does not work at all anymore.
Readers will encounter not only stories they have heard before, but some new stories and a moving discussion of the responsibility of the engineer to the public and the ways young engineers can be helped to grasp them.
"Success is success but that is all that it is," Dr. Petroski writes. It is failure that brings improvement.
1. What happened to the Golden Gate Bridge on its 50th birthday?| A．It carried more weight than it could. |
| B．It swayed violently in a strong wind |
| C．Its roadway was damaged by vehicles |
| D．Its access was blocked by many people. |
| A．No design is well received everywhere |
| B．Construction is more important than design. |
| C．Not all disasters are caused by engineering design |
| D．Improvements on engineering works are necessary. |
| A．Failure can lead to progress. | B．Success results in overconfidence |
| C．Failure should be avoided. | D．Success comes from joint efforts. |
| A．A news report | B．A short story. |
| C．A book review | D．A research article. |
5 . The end of the school year was in sight and spirits were high. I was back teaching after an absence of 15 years, dealing with the various kinds of "forbidden fruit" that come out of book bags. Now was the spring of the water pistol.
I decided to think up a method of dealing with forbidden fruit.
"Please bring that pistol to me," I said. "I'm going to put it in my Grandma's Box."
"What's that?" they asked.
"It's a large wooden chest full of toys for my grandchildren," I replied,
"You don't have grandchildren," someone said.
"I don't now." I replied. "But someday I will. When I do, my box will be full of wonderful things for them."
My imaginary Grandma's Box worked like magic that spring, and later. Sometimes. students would ask me to describe all the things I had in it. Then I would try to remember the different possessions I supposedly had taken away—since I seldom actually kept them. Usually the offender would appear at the end of the day, and I would return the belonging.
The-years went by, and my first grandchild Gordon was born. I shared my joy with that year's class. Then someone said, "Now you can use your Grandma's Box." From then on instead of coming to ask their possessions back, the students would say, "That's okay. Put it in your Grandma's Box for Gordon."
I loved talking about the imaginary box, not only with my students but also with my own children. They enjoyed hearing about all the forbidden fruit I had collected. Then one Christmas I received a surprise gift—a large, beautifully made wooden chest. My son Bruce had made my Grandma's Box a reality.
1. What was the author's purpose in having the conversation with the students?| A．To collect the water pistol. | B．To talk about her grandchildren. |
| C．To recommend some toys. | D．To explain her teaching method. |
| A．The student's parent. | B．The maker of the Grandma's Box. |
| C．The author's grandchild. | D．The owner of the forbidden fruit. |
| A．They went to play with the baby. | B．They asked to see the Grandma's Box. |
| C．They made a present for Gordon. | D．They stopped asking their toys back. |
| A．She enjoys telling jokes. | B．She is a strict and smart teacher. |
| C．She loves doing woodwork. | D．She is a responsible grandmother |
6 . Rainforests are home to a rich variety of medicinal plants, food, birds and animals. Can you believe that a single bush（灌木丛）in the Amazon may have more species of ants than the whole of Britain! About 480 varieties of trees may be found in just one hectare of rainforest.
Rainforests are the lungs of the planet-storing vast quantities of carbon dioxide and producing a significant amount of the world's oxygen. Rainforests have their own perfect system for ensuring their own survival; the tall trees make a canopy（树冠层）of branches and leaves which protect themselves, smaller plants, and the forest animals from heavy rain, intense dry heat from the sun and strong winds.
Amazingly, the trees grow in such a way that their leaves and branches, although close together, never actually touch those of another tree. Scientists think this is the plants' way to prevent the spread of any tree diseases and make life more difficult for leaf-eating insects like caterpillars. To survive in the forest, animals must climb, jump or fly across the gaps. The ground floor of the forest is not all tangled leaves and bushes, like in films, but is actually fairly clear. It is where dead leaves turn into food for the trees and other forest life.
They are not called rainforests for nothing! Rainforests can generate 75%of their own rain. At least 80 inches of rain a year is normal-and in some areas there may be as much as 430 inches of rain annually. This is real rain-your umbrella may protect you in a shower, but it won't keep you dry if there is a full rainstorm. In just two hours, streams can rise ten to twenty feet. The humidity（湿气）of large rainforests contributes to the formation of rainclouds that may travel to other countries in need of rain.
1. What can we learn about rainforests from the first paragraph?| A．They produce oxygen. | B．They cover a vast area. |
| C．They are well managed. | D．They are rich in wildlife. |
| A．Heavy rains | B．Big trees. |
| C．Small plants. | D．Forest animals. |
| A．For more sunlight. | B．For more growing space. |
| C．For self-protection. | D．For the detection of insects. |
| A．Life-Giving Rainforests | B．The Law of the Jungle |
| C．Animals in the Amazon | D．Weather in Rainforests |
7 . Fear, anxiety, panic — those are the words Elaine Peng used to describe the state of her service’s recipients (接受者) who are fighting mental health problems through lectures and support groups on WeChat. President Donald Trump’s transaction (交易) ban on the social networking app has worsened their emotional state.
Since Peng founded the organization in 2013 with the mission of raising mental health awareness within the Chinese community, she has gradually built up her network. Now she has two WeChat groups of more than 500 people, including service recipients and volunteers.
Peng said, “WeChat is the organization’s primary communications tool because it is much friendlier than other US-developed apps. We also respond to emergency situations through WeChat. For instance, we recently rescued a patient from a parking lot, using the app’s real-time location feature, where his condition suddenly worsened and he didn’t know where he was,” she said.
Seeing that her group’s mission and operation will be affected in a significant way, Peng joined a legal challenge filed by the nonprofit US WeChat Users Alliance, seeking to block the ban. The presidential executive order does not define the word “transaction”, and Secretary of Commerce Wilbur Ross has not defined which particular transactions would be illegal. Ross may issue the definitions by Sunday, or he may not say anything for a long time, but the situation is already harming people who depend on WeChat. If the judge does not prevent the order from taking effect, then the law goes into effect Sunday, and no one knows exactly what it means.
We Chat has roughly 19 million daily active users in the US, most of them of Chinese descent, according to the complaint filed by the plaintiffs (原告) last month. The lawsuit argues that the order is illegal because it violates (侵犯) users’ free speech rights. It also argues that the ban targeted Chinese Americans, who rely on the app for work, worship and staying in touch with relatives in China.
1. In which section of a newspaper may this text appear?| A．Entertainment. |
| B．Science. |
| C．Education. |
| D．News brief. |
| A．To arouse mental health awareness. |
| B．To build up her network. |
| C．To provide service for recipients. |
| D．To keep in touch with relatives. |
| A．Subjective. |
| B．Objective. |
| C．Indifferent. |
| D．Doubtful. |
| A．Wechat ban-users’ expectation |
| B．Wechat ban-users’ demand |
| C．Wechat ban-users’ concern |
| D．Wechat ban-users’ disaster |
8 . China is determined to land its astronauts on the moon and set up a scientific station there,according to a project leader.
Zhou Yanfei,deputy chief designer of China's manned space program,said on Friday that China wishes to use the manned lunar missions to carry out scientific surveys and technology demonstrations,explore ways to develop lunar resources and strengthen the nation's space capabilities.
＂A new wave of lunar explorations has been emerging in the world,with participants aiming to make sustainable missions to deepen knowledge of the moon and exploit resources there,"he said in a report delivered at the 2020 China Space Conference in Fuzhou,Fujian province."Unlike other nations,China must depend on its own science and technology to realize our goals."
The country is independently able to land its astronauts on the moon because it has the technologies,a group of well-trained,innovative professionals and high-efficiency research and management systems,Zhou said."However,our existing carrier rockets can't perform landing missions to the moon because they are not powerful enough.The Shenzhou- series manned spaceships are not suitable for lunar expeditions.We don't have a lunar landing capsule,"he said."Our ground support system was designed for operations in low-Earth orbit rather than on the lunar surface.
To solve the problem, we set out to produce a powerful launch vehicle. Zhou said researchers thought about two approaches-making a new heavy-lift rocket,or adjusting the next-generation rocket designed to carry astronauts,which is under development.Researchers prefer the latter approach because it would be easier to design and make and would become operational earlier.
The new rocket is being designed at the China Academy of Launch Vehicle Technology.Its main body will be 87 meters tall,with a diameter of 5 meters,which would make it almost twice as tall as the Long March 5,currently the biggest of China's rockets.
1. Which is NOT the goal of the manned lunar mission?| A．To explore lunar resources. |
| B．To perform scientific experiments. |
| C．To set up a scientific station. |
| D．To strengthen the national space power. |
| A．China is not capable of pursuing the manned lunar program. |
| B．There are still difficulties in pursuing the manned lunar program. |
| C．There are a series of steps in the Manned Lunar program. |
| D．It is manageable to carry out the Manned Lunar program. |
| A．Nations must depend on themselves to explore the moon. |
| B．The Long March 5 is the biggest of China's rocket. |
| C．The newly-designed rocket will not carry astronauts. |
| D．Producing a powerful launch vehicle is the most difficult part in the program. |
| A．The new rocket is big enough to perform landing missions. |
| B．The new rocket is being made to launch lunar spaceship. |
| C．China's scientific power has improved. |
| D．The new rocket will be put into use soon. |
9 . It’s late in the evening, time to close the book and turn off the computer. You’re done for the day. What you may not realize, however, is that the learning process actually continues in your dreams.
It might sound like science fiction, but researchers are increasingly focusing on the relationship between the knowledge and skills our brains absorb during the day and the often strange imaginings they generate at night. Scientists have found that dreaming about a task we’ve learned improves performance in that activity (suggesting that there’s some truth to the popular idea that we’re “getting” a foreign language once we begin dreaming in it). What’s more, dreaming may be an essential part of understanding, organizing and retaining what we learn.
While we sleep, research indicates, the brain replays the patterns of activity it experienced during waking hours, allowing us to enter what one psychologist calls a neural (神经的) virtual reality. A vivid example of such replay can be seen in a video researchers made recently about sleep disorders. They taught a series of dance moves to patients suffering from sleepwalking and related conditions. They then videotaped the subjects as they slept. Lying in bed, eyes closed, one female patient on the tape performs the dance moves she learned earlier.
This shows that while our bodies are at rest, our brains are drawing what’s important from the information and events we’ve recently encountered, then integrating that material into the vast store of what we already know. In a 2010 study, researchers reported that college students who dreamed about a computer maze (迷宫) task they had learned showed a 10-fold improvement in their ability to find their way through the maze compared with participants who did not dream about the task.
That study’s chief researcher Herbert Smith suggested that studying right before bedtime or taking a nap following a study session in the afternoon might increase the probability of dreaming about the material. Think about that as you go to sleep tonight.
1. What happens when one enters a dream state?| A．The body continues to act as if the sleeper were awake. |
| B．The neural activity of the brain will become intensified. |
| C．The brain once again experiences the learning activities of the day. |
| D．The brain behaves as if it were playing a virtual reality video game. |
| A．It replaces old information with new material. |
| B．It processes and absorbs newly acquired information. |
| C．It regroups information and places it in different files. |
| D．It systematizes all the information collected during the day. |
| A．Staying up late before finally going to bed. |
| B．Having a period of sleep right after studying. |
| C．Having a dream about anything you are interested in. |
| D．Thinking about the chances of dreaming about the material. |
| A．How study affects people’s dreams. |
| B．Why people learn more after sleeping. |
| C．What time students should study and sleep. |
| D．How dreaming may lead to improved learning outcomes. |
10 . Most kids can walk into a library or bookstore and find hundreds of books to read. But it’s not that simple for kids who are blind. They read in a different way. Jenny Lee and other braille (盲文) transcribers take the printed words of a book and change them into a code of raised dots. Blind people can read these dots with their fingers. To know what braille feels like, take a ballpoint pen and press hard onto a piece of paper. Now turn the paper over and touch the raised dot made by the pen point.
When Lee first saw the dots of the braille alphabet, she wondered if she’d ever be able to read and write them easily. She took a class and practised hard for about six months before she passed the final exam: she had to convert 35 pages of a book into braille. Today, Lee works for a publisher. One of her jobs is to change children’s books into braille.
To do this, Lee first types the story into a computer and then uses a computer program to translate it into the braille code. Next, she looks over the translation several times to make sure it’s mistake-free. After that, a copy of the braille story is printed with a special printer. Then Lee and a proofreader work together to find and correct any mistakes. When a book is ready, many copies of it are printed. Afterwards, some are sold through websites and others are sent to libraries.
Sometimes, going over a story again and again gets tiring. That’s when Lee takes a break. Several of Jenny Lee’s co-workers, who are blind, use guide dogs. When the animals aren’t working, Lee likes spending a few minutes with them. To her, playing with dogs “is always a pick-me-up in the middle of the day”.
“I love this mission,” Lee says. “Through my brain power and my fingers, I am putting the dots into some kid’s hands.”
1. How does the writer explain what braille feels like?| A．By explaining what braille words look like. |
| B．By describing how blind people read books. |
| C．By asking readers to experience it themselves. |
| D．By giving examples of different braille words. |
| A．She was excited to get a new skill. |
| B．She was amazed at the clever idea. |
| C．She realized she could teach it herself. |
| D．She believed it would be difficult to learn. |
| A．A discussion to release work stress. |
| B．Something to improve one’s appetite. |
| C．Something to help restore one’s spirit. |
| D．A free ride accompanied with a guide dog. |
| A．Profitable and hopeful. | B．Tiring but meaningful. |
| C．Relaxing and helpful. | D．Boring but challenging. |
