1 . I’m May. high school seniors all around the U. S. scramble (争抢) to get ready for prom. Prom. short for promenade, is a formal dance held by a high school before graduation. It's an important aspect of American school culture because it's the last high-school dance seniors will ever attend.
Prom entails (牵涉) countless traditions. First a guy must ask a girl to go to prom with him. Most guys choose to do special prom proposals in hopes of winning the girl's heart with their creativity. Then he will rent a tuxedo (燕尾服), and the girl will often get their hair, nails and makeup done professionally. That night couples will take pictures, and then they will often take a limousine (豪华轿车) to dinner and to the dance. Several reports state that parents can spend upward of $ 2,000 to give their kids the perfect prom experience.
The history of prom can be traced back to the last half of the 1800s. At that time, American universities and colleges organized dances each year for their graduating students. The purpose was not only to entertain the students but also to prepare them for the wider world by teaching them proper manners for men and women.
Later, high schools took over the prom tradition. In the 1950s, high schools began moving the dance from their gyms to beautiful hotels or country clubs to make the event even more special. Perhaps the most amazing prom took place in 1975, when Susan Ford, the daughter of the country's president, received permission to hold her high school's prom at the White House. So far, no other prom has managed to top that.
1. What does this article mainly explain about prom?| A．Its unusual atmosphere. |
| B．Its present and future. |
| C．Its educational benefits. |
| D．Its customs and roots. |
| A．Their appearance. |
| B．Their possessions. |
| C．Their transportation. |
| D．Their supervisors. |
| A．What marketing plan to use. |
| B．How to behave around others. |
| C．Which food was best to eat. |
| D．When to earn a great degree. |
| A．In an official residence. |
| B．In an international court. |
| C．In a motion picture studio. |
| D．In a modern gallery. |
2 . Independent living at home is the ideal for every aging person. But a fall or other health-threatening incidents can change everything rapidly.
The wearable “panic buttons” introduced in the late 1980s were a great advance. But they only work if people actually wear them and can reach the button in an emergency. Today there are passive wearables that automatically detect falls, and camera-based systems to monitor elder safety.
Coming from a 40-year career in the semiconductor and wireless communication field, Rafi Zack decided to find a better alternative. “People aren’t devoted to wearing small devices 24/7, and camera-based systems are an invasion（侵犯）of privacy,” he points out, “The most challenging aspect is a fall. How fast we can detect a fall matters because the medical situation worsens quickly. Sometimes people stay on the floor for a long time. We have to find out how to solve that problem.”
Zack is a co-founder, CEO and vice president of R&D at EchoCare Technologies which has developed ECHO (Elderly Care Home Observer), a cloud-connected monitor based on radar technology and machine learning.
Because radar sees through walls, one ECHO unit fixed on the ceiling or wall can monitor one person (or two persons, in a future version) in a standard-sized apartment in a senior living facility. The device detects falls, breathing difficulties, drowning in a bathtub and other dangerous events. It gives out warnings to potential health worsening conditions by continuously monitoring and analyzing the person’s location, posture（姿势）, motion and breath. EchoCare tested the device in the United States, Japan, Australia and Israel. ECHO was certified（认证）in 2019 in Japan with the most aging population in the world.
“Bathrooms were the main testing area where about 17,000 deadly accidents happen annually.” said SMK Director and Executive Vice President Tetsuo Hara. “Bathroom makers, home security service providers and nursing homes are highly interested in EchoCare’s solution.” Zack noted, “As more and more elder people live alone as a result of social distancing, there is an increased need to monitor them without the burden of wearables or privacy-invading cameras.”
1. What’s the advantage of ECHO over “panic buttons”?| A．It has camera-based systems. | B．It has been widely accepted. |
| C．It can function without cameras. | D．Its buttons can be easily reached. |
| A．It is designed to send out warnings regularly. |
| B．It monitors dangerous health-related events. |
| C．It was certified in many developed countries. |
| D．It detects more than one person at the same time. |
| A．It’ll become more popular with the elderly. |
| B．It’ll stop 17,000 deaths happening annually. |
| C．It’ll be used in nursing homes and hospitals. |
| D．It’ll help elderly people to live an active life. |
| A．An Advanced Medical Instrument |
| B．A High-tech Monitor for the Elderly |
| C．The Invention of a Healthcare Device |
| D．The Improvement of a Medical Facility |
3 . With the social media freely available, I've realized how easy it is to become a jealous cow. The truth is that however much I remind myself of the many wonderful things I have in my life, there are still moments when I look at those around me and feel bitterly upset by their success.
It's a horrible thing to admit! In an ideal world, I'd never want to be jealous of another person's achievements and I'd want to celebrate the successes of my friends. But sometimes it's hard, even when we want to. But I don't want to live my life as a jealous cow, and I assume you don't either.
It's easier to celebrate other people's wins if you celebrate your own. How often do we take the time to enjoy our success rather than instantly move onto the next thing we want to achieve? Last year, I decided to write a book. It was the only professional goal I set for myself and, while it tired me out, I got there. But as soon as it was done, I started planning my next goal-making the book a success. As I saw other people publishing books, I stopped celebrating and instead began to fear that mine wouldn't compete.
When I told a friend how I was feeling, she reminded me how much easier it is to clap for someone else when we also clap for ourselves. So, I took myself out for lunch, ordered a glass of wine and wrote myself a congratulations card. When I saw all those other books being written on my social media, I felt proud of each and every one of us who had battled to the end of the word count.
The other trick for celebrating other people's success is to realize that there is no limit on success. We can make more, which means that while it might seem as if others have everything and we have nothing, the reality is that life turns quickly and our luck could change at any time. If others have achieved those things, we can too. When we celebrate others, we're acknowledging their achievements but also cheering for ourselves as well as for our hopes and dreams and our belief that we can make them happen. And hopefully, when we do, those people will cheer for us too.
1. What can we infer from Paragraph 1?| A．Social media is the source of the author's jealousy. |
| B．Frequent successes on social media encourage envy. |
| C．It is a pleasure to face others' successes on social media. |
| D．People tend to be crazy about immediate success online. |
| A．Appreciate what's been done. |
| B．Show it off on social media. |
| C．Reflect on gains and losses. |
| D．Waite for others' congratulations. |
| A．pursuing those achievable goals |
| B．devoting yourself to the next goal |
| C．admitting personal incompetence |
| D．changing your attitude to success |
| A．I'm so happy for us! |
| B．What a considerate friend! |
| C．I don't care about it! |
| D．How selfless you can be! |
4 . Smartphones, tablets and other digital devices can be addictive. They affect sleep. They draw kids into an alternate universe, often distracting（使分心）them from more productive-and healthier-real-world activities. And they are often linked to anxiety and depression, learning disabilities and obesity（肥胖）. Yet for many teenagers, cellphones and social media are also absolutely necessary tools for planning their social lives, keeping up with schoolwork and staying in touch with out-of-town friends and relatives.
How can parents make the most of the constructive uses of screen-based technology while minimizing its harmful effects？
The key is helping kids use technology as a tool, not a toy, “where there’s some purpose other than the medication of boredom,” says Jim Taylor, a psychologist and author of the book Raising Generation Tech：Preparing Your Children for a Media-fueled World. Taylor, like many other medical and mental health professionals, advises parents to set limits and stick to them. They should restrict the amount of time their kids spend on devices, create tech-free zones-no cellphones in their bedrooms, for example-and tech-free times, such as at the dinner table, in restaurants and on family outings.
Perhaps the best thing you can do is serve as a good role model by exhibiting the same online behavior you expect of your children, says Dr. Elias Aboujaoude, a Stanford University psychiatrist. “If parents are breaking their own rules,” Aboujaoude says, “kids cannot be expected to behave differently.”
Chad Landgraf, 44, of Oklahoma, told me he was worried about how addicted his 12-year-old son and 5-year-old daughter became when they were on their devices. So, hoping to set an example, he switched from e-books to old-fashioned print. “When I had my Kindle or ipad open, they. didn’t know if I was reading or surfing the net,” Landgraf says. “But at least if I have a paper copy of a book, they know I am reading. Modeling seems like the easiest way.”
1. What may be the result of children’s using digital devices?| A．Health improvement. | B．Free creation. |
| C．Sleep disorder. | D．Good conduct |
| A．Killing time by using screen-based technology. |
| B．Forbidding kids using smartphones. |
| C．Setting clear boundaries for kids. |
| D．Restricting tech-free family time. |
| A．He was afraid of becoming addicted. | B．He expected to be a role model. |
| C．He was tired of surfing the net. | D．He preferred paper copies of books. |
| A．Parenting in a digital world | B．Learning to be intelligent parents |
| C．Using smart devices wisely | D．Helping children behave themselves |
5 . Hartley got to Gentral Slalion nearly an hour before his train was due to leave. A lifetime in the theatre had given him a healthy — indeed excessive (过分的) — sense of punctuality; a lifetime of unwanted cups of coffee, constant checking of the time, yet another turn around the block before that all too often pointless, tiresome audition (试镜).
Hartley was 75 — pretty fit for his age, legs holding lip, memory still ticking over nicely — though the occasions for punctuality were now rather fewer. But he was a creature of habit and couldn’t change now.
He repaired to the restaurant purchased a coffee and a blueberry muffin, tired and failed to find a litter-free table. The coffee was awful, the muffin was stale — but the coffee was always awful, the muffin always stale. Hartley refused to let himself be annoyed. His visit to the city had not been without its pleasures. Lunch with an old actor-chum (好友), then a film — regrettably not utilizing (利用) his own talents — had rounded out an agreeable day.
Hartley was a good actor, although the calls on his talents were now infrequent. But really, he thought draining his awful coffee, he’d had a reasonably good career. Something to be proud of. But he’d never had that break-through part.
He headed for his platform. Just as the train was about to pull out a man ran down the platform, jumped aboard as the door slammed shut and sank into the seat next to Hartley.
“Cutting it a bit fine”, he said.
“Indeed”, Hartley replied. “A close run thing”.
The man — forty-ish, amiable looking — gave him an amused glance.
This brief exchange served as an adequate ice-breaker and they chatted their way through the outer suburbs and into the countryside. Having satisfactorily disposed of the sad state of the railways, country versus city living, his neighbour asked Hartley what he did—or had done—for a living.
Hartley hated telling people he was an actor. He was not ashamed of his job. Not in the least, but he had long tired of reactions ranging from “what have I seen you in” to “how do you learn all those lines”.
So in situations like this he simply selected an occupation from a former role. Bit risky, of course. You say you’re a doctor and find yourself meeting the quizzical（疑问的）gaze of a heart surgeon. But he’d never been caught out and it was harmless enough game, Hartley felt. It amused him, and he’d given some damn good performances too.
“I’m a lawyer”, he replied. “Retired several years ago. Property law. Bit of criminal stuff”.
The train was slowing down. The man glanced out of the window.
“My station. I had you quite wrong then”.
He stood and took down his briefcase from the overhead rack.
“Yes, I’d have said you were an actor. The voice especially. Still, lawyers are actors in a way, don’t you think? Plenty of drama in a courtroom”.
The train drew into the station.
“I’m a film director. Casting a feature at the moment. You study faces. On the train. Everywhere. Always on the lookout. Anyway, enjoyed our chat. Bye.”
1. What did Hartley think of his not telling his occupation?| A．Harmful to his acting career. | B．Amusing despite the risk |
| C．Helpful to protect his identity | D．Upsetting when caught out. |
| A．He assumed Hartley had given another answer. |
| B．He understood Hartley’s profession was acting. |
| C．He thought Hartley practiced a different profession. |
| D．He mistook Hartley for another person. |
| A．shows the readers how unexpectedly Hartley’s career ends |
| B．describes Hanley’s shock on finding the man is a director |
| C．confirms Hartley's lack of luck in spite of his acting skills |
| D．proves the man will reconsider giving Hartley a chance to act |
| A．Acting up | B．Employ talents |
| C．Selecting an occupation | D．Casting a feature |
6 . With the world’s attention on vaccines (疫苗), now feels like a good moment to sing the praises of an often forgotten contribution to their development. Three hundred years ago this month, Lady Mary Wortley Montagu got her daughter inoculated (接种) against smallpox, making her child the first person in the West to be protected in this way. Without Montagu’s willingness to adopt a practice she had learned from other cultures, the introduction of vaccines around 80 years later would never have taken place.
Montagu first witnessed inoculation when she accompanied her husband to Turkey in 1717. Inoculation had started in Asia, probably in China, as early as the 10th century AD. Montagu observed how older women in Turkey took a tiny amount of pus (脓) from a person with smallpox. They then used needles to make cuts on people’s wrists and ankles and added the pus to their bloodstream. This helped people gain immunity from future infection.
Like other visitors to the country, Montagu took steps to ensure that her son was inoculated in Turkey. This worked well, but she knew that trying it in England would be far more challenging. Inoculation performed by unlicensed amateurs would threaten doctors’ professional standing and potentially rob them of valuable income. Churchmen also disagree with the practice, as they saw it as going against nature.
Back in England, Montagu observed the increased severity of smallpox infections. Eventually, in April 1721, she decided to use the Turkish practice to have her daughter inoculated, because she believed that the rewards would outweigh the risks. After a safe time had passed following the inoculation, Montagu allowed doctors to examine her daughter.
Doctors in Britain gradually accepted the practice. About so years later, a pioneering physician found smallpox vaccines to destroy smallpox completely. As early as last century, academics argued that Montagu was no more than an enthusiastic amateur. In truth, she made a vital scientific contribution towards finding the cure for smallpox.
1. What is the second paragraph mainly about?| A．The origin of smallpox inoculation. |
| B．Montagu’s first access to inoculation. |
| C．The benefits from smallpox inoculation. |
| D．Turkish women’s invention of inoculation. |
| A．it was against human nature | B．it might harm doctors’ interests |
| C．it was beyond doctors’ abilities | D．it might shake churchmen’s belief |
| A．The increased severity of smallpox infections. |
| B．A physician’s discovery of smallpox vaccines. |
| C．The result of Montagu’s daughter’s inoculation. |
| D．Montagu’s focus on its rewards rather than its risks. |
| A．An unsung hero | B．No limit to creation |
| C．Development of vaccines | D．A historic medical innovation |
Shooting down an ice-covered track, a bobsled（大雪橇）can go faster than 80 miles an hour, and riders can feel force five times stronger than the pull of gravity. A race can be won or lost by one hundredth of a second. How do bobsleds go faster than cars on a highway? The answer is a combination of athletics and science.
At the start of a race, the crew push their sled, building up speed before they jump in for the ride. For months before the race, the crew have built up power in their legs. The push is the crew's only chance to add speed. All other work goes into keeping friction and drag（摩擦力和阻力）from slowing the sled down.
The design of the sled's runners（滑板）reduces their friction with the ice. The friction of a moving runner melts a little ice right under the runner, and the runner rides on that thin layer of water. The runners are rounded on the bottom. Runners that are too flat may not melt enough ice for fast ride. Runners that are too round may become too warm, softening the ice and slowing the sled down. No amount of rounding is perfect for all races because the hardness of the ice depends on the weather on race day.
Bobsleds used to be open. The riders did not sit inside a hull（外壳）. As the crew sped down the track，the air would create drag. Today, a sled's hull reduces drag by splitting the air in front of the sled and making it flow smoothly along the slides. As with the runners，strict rules apply to the hull. For example，no team may add any part that would create helpful air currents.
Reducing friction and drag creates another challenge: high speeds. “The faster the sleds car travel on the run, the more thrilling the race,” one research team wrote. “But the track must not be too fast: he crew still need to be able to reach the bottom safely.”
1. What's the text mainly about?| A．The shape of the sled. | B．The design of the runners. |
| C．The safety rules applying to the sled. | D．The elements relating to the sled's speed |
| A．Proper amount of melted ice is needed for a fast ride. |
| B．The rounder the runners are, the faster the sled goes. |
| C．Thin layer of water would drag the runners backward. |
| D．A sled's movement has nothing to do with weather. |
| A．It's comfortable to sit in. | B．It leads to beneficial air flow. |
| C．It helps to create a safe ride. | D．It's free from strict rules. |
| A．Safety is the most important. | B．Keeping high speed is difficult. |
| C．Riders' desire to win is understandable. | D．The crew's cooperation is necessary. |
8 . Just as a hungry brain craves (渴望) food, a lonely brain craves people. A new brain study demonstrates this. After being left alone, it shows people's brains would be activated at the sight of other people. The action was in the same brain region that speeds up when a hungry person sees food.
Livia Tomova, a neuroscientist, who studies how the brain produces mental activities, and her colleagues began this study. They recruited (招募) 40 people. On one day, the participants had to fast—not eat anything at all—for 10 hours. On another day, the same people were placed in a room for 10 hours. They couldn't see anyone. No friends, no family and no social media. They weren't even allowed to check their email. After both days, Tomova and her colleagues put the people in a MRI machine. It shows activity in the brain by tracking how much blood is flowing to each region.
At the end of each day, the participants showed high activity in a brain area called the midbrain. The scientists were interested in two, small areas within it. Both areas produce dopamine, a chemical that is important in craving and rewards. The two areas activated when hungry participants saw pictures of tasty pizza or juicy hamburgers. After the volunteers had been isolated, those brain areas became active when they saw social activities they missed. It might be playing sports or chatting with friends.
The midbrain plays an important part in people's motivation to seek food or friends. In fact, it responds to food and social signals even when people aren't hungry or lonely. But hunger and loneliness increased the reactions and made people's responses specific to the thing they were missing. And the more hunger or isolation the volunteers said they were experiencing, the stronger the activity in this part of the brain. Tomova and her colleagues published their results November 23 in Nature Neuroscience.
1. How does Tomova test out the result of the study?| A．By stimulating desire. | B．By controlling blood flow. |
| C．By monitoring brain activity. | D．By examining mental activities. |
| A．It consists of two areas. | B．It helps motivate desire for food. |
| C．It stops working when people are full. | D．It decreases responses to lost friends. |
| A．A midbrain area. | B．A social activity. | C．A volunteer. | D．A hamburger. |
| A．Dopamine—a Sure Sign of Age | B．Midbrain—a Nest for the Thoughts |
| C．Hunger Makes Mental Health Struggle | D．Loneliness Makes Our Brains Need People |
9 . Many bad things in life start with a lie. Perhaps it’s one of the lies you tell yourself, like I’m not good enough. That lie can hold you back from many things. Then there are the lies others tell you to manipulate their way to getting what they want. Perhaps the most devastating one is a lie that someone completely makes up to hurt you or try to ruin your life.
Sadly, there are now many people who believe that lying to get what you want is now the way of the world and perfectly acceptable. That woman who attacked the young black man in New York after falsely accusing him of stealing her iPhone is saying he attacked her-even though the truth is all on video. And there are people, mostly racist people, who believe her because they want to.
It is mistake to think that any belief has ultimate(终极的)power over the truth. But some beliefs are so popular and shared by so many people that they can cause an uprising(暴动)and make things horrible for the rest of us.
Unfortunately, the cultural lies that people tell themselves happen globally as well as in the school yard or on the job. On top of that, the personal lies that people spread about others can make life hard. When your value system is called into question, and you fear how this will make you look to the people in your world, it can make you crazy.
Lying is often a result of selfishness. Some people don’t care who gets hurt, as long as they get what they want.
I have watched good lives get put on hold because someone told a lie. I have seen people put in jail because of a lie. I have held the hands of a kind-hearted dying man who only wanted to know the truth about why his children were turned against him. Lies only hurt. Let’s remember that. Let’s not forget the damage that can be done, and maybe we will all get to live better lives, even though we are sharing a very difficult time. Lies are always uncovered. Always.
That may not help you night now, but it is something to hold onto.
1. What is the main idea of the first paragraph?| A．The harm lies can do. | B．The purpose behind lies. |
| C．Different types of lies. | D．The most devastating lies |
| A．To analyze how lies cause bad effects |
| B．To prove there are too many racists in America now. |
| C．To explain why truth is the ultimate power. |
| D．To show that many people lie to get what they want. |
| A．Cultural lies are often obvious. |
| B．Most personal lies result from hatred. |
| C．Wrong common beliefs can be powerful |
| D．People who spread lies should be put into prison. |
| A．Lies will grow and spread. |
| B．Lies are not acceptable. |
| C．Lies will be exposed sooner or later. |
| D．One truth is better than a hundred lies |
In Africa, the honeyguide birds can respond to human calls to lead people to honey—what scientists describe as a mutualistic interaction, or one that benefits both creatures. The birds tweet and fly from tree to tree to guide honey seekers to hidden bee nests, typically inside trees. Then, humans open the trees to find honey, and the birds can dine on beeswax, their favorite food. |  |
Dogs have an excellent sense of smell, which is why the folks at Penn Vet Working Dog Center are training dogs to identify the smell of cancer using tissue and blood samples from people who suffer. The scientists hope to develop a way for dogs to screen samples first, then perform follow-up testing on the samples the dogs flagged—a system for spotting cancer in its early stages. |  |
Having a snake wrapped around your neck isn’t necessarily what you usually expect. But Monty, a 13-year-old snake has been helping customers relax with neck massages(按摩). It’s unlikely he was trained to do the job and is just pulsating like any other snake would when around a person’s neck. Regardless, this special snake books out a few weeks in advance. |  |
The Guide Horse Foundation has been training miniature horses (those standing 34 inches or less) as assistance animals for the visually damaged since 1999. Miniature horses are ideal service animals for people who feel uncomfortable with dogs or who want a guide animal with a longer life span. The horses typically live from 30 to 40 years. |  |
1. According to the text, which animal can help you relax?
| A．A snake. | B．A dog. |
| C．A honeyguide bird. | D．A miniature horse. |
| A．blind people who dislike dogs | B．blind people who can live longer |
| C．animal lovers who search for honey | D．animal lovers who suffer from cancer |
| A．special training | B．great potentials |
| C．unique jobs | D．high intelligence |
