1 . If there had to be a father of handwashing in history, it would be Ignaz Semmelweis. While working at Vienna General hospital, the Hungarian doctor, faced with a situation in which maternal death (孕产妇死亡) in hospitals were significantly higher than local clinics, tried hard clues as to why.
Germs (细菌) were yet to be discovered, and it was still believed in the 1840s that disease was spread by bad smells in the air. So it didn’t seem a problem that trainee doctors hanging out of labs to dissect (解剖) human bodies would pop up to the maternity ward (产房) to deliver a baby without washing their hands.
Then an accidental finger cut by a knife during a dissection caused a doctor to die, seemingly of the same sign the mothers had been getting. Semmelweis assumed that something from the dead bodies was to blame, which might, through the hands of doctors, make their way into women’ s bodies during childbirth.
To test his theory, he ordered doctors to wash their hands and instruments in some chlorine solution. As a result, the death rate for new mothers dropped to about 1 percent, compared with that of as high as 18 percent before the experiment.
However, he faced great resistance, and met a sad end. People at that time didn’t think of themselves as sort of walking Petri dishes. And the majority of doctors then were from middle- or upper-class families, and thought of themselves as very clean people.
Over the next 40 years, a better understanding of germs developed, and attitudes to hygiene (卫生) gradually shifted. In 1876, the German scientist Robert Koch discovered the anthrax bacillus (炭疽), kicking off the new research field of medical bacteriology. Many more germs were later identified. Surgeons started to take handwashing seriously.
By the 1890s and into the early 1900s, handwashing moved from being something doctors did to something everybody had been told to do.
1. What was the situation like in the 1840s?| A．Germs might have been discovered then. |
| B．Women suffered from delivering babies then. |
| C．The air at that time was dirty and full of viruses. |
| D．People were unaware of how disease was spread. |
| A．Liquid. | B．Option. | C．Tissue. | D．Shell. |
| A．It was effective. | B．It was necessary. |
| C．It was ridiculous. | D．It was dangerous. |
| A．Steps to Protect Yourself |
| B．Disease Spreading by Your Hand |
| C．Hand Washing Critical in Fighting Viruses |
| D．The First Recorded Discovery of Handwashing |
2 . Yet although officers will not disappear, it’s hard to imagine that working life will return to before-COVID-19 (新冠肺炎) ways. For more than a century workers have pushed themselves on-to crowded trains and buses, or suffered traffic jams, to get into the office, and back, five days a week. However, for the past one year they have not had to commute (上下班往返), and may enjoy it for a long time.
Employers, for their part, have supported expensive offices in city centers because they need to gather workers in one place. The rent is only part of the cost; there are cleaning, lightning, printers, catering and security on top. Needless to say, in the homeworking era these costs are cut down.
Another part of the homeworking era may be the disappearance of the five-day working week. Even before the COVID-19 many workers became used to taking phone calls or answering emails at the weekend. In the homeworking era, the dividing line between home and working life, a useful way of relieving stress, will be even harder to keep. It may be lost altogether.
What’s more, without the Monday-to-Friday commute, the weekend seems more nebulous, for employees may walk and take breaks freely, with only the company video calls unchanged.
Looking further out, the homeworking era may bring other changes. Some may decide to live in small towns where housing costs are lower, since they have no need to commute. Men will have fewer excuses to skip cleaning or childcare if they are not disappearing to the office.
In a sense, this is a return to normal: until the 19th century most people worked at or close to their homes. But social historians may still regard 2020 as the start of a new age.
1. Which one is the change of the working life after the COVID-19?| A．Living in big cities. | B．More traffic jams. |
| C．Reduced working cost. | D．Less phone calls at the weekend. |
| A．Important. | B．Unclear. | C．Fruitful. | D．Annoying. |
| A．Doubtful. | B．Objective. | C．Supportive. | D．Negative. |
| A．2020: the Start of a New Age? |
| B．Working at Home: Are You Ready? |
| C．Who is the Winner: Employer or Employee? |
| D．Home and Working Life: How to Keep Balanced? |
3 . Everyone has unique personalities, which makes life more interesting.
Over the last 25 years, doctors have classified personalities into five basic traits(特性), called the Big Five. Everyone can be described as having varying levels of agreeableness(随和), conscientiousness(认真)，emotional stability(情绪稳定)，extroversion(外向)and openness to experience.
Contrary to common knowledge, people aren't confined to certain personality types. Usually, no one is entirely an extrovert or an introvert. While a minority may be at the extreme ends of a trait, most people are somewhere in the middle. “Every personality trait is a continuous dimension. You can be very high or very low, and most people fall somewhere in between,” said Christopher Soto, a doctor at Colby College.
Personality isn’t limited to humans, either. Research finds that all animals have personalities. Both the personality of animals and humans has an evolutionary origin. Evolution can a so explain why personalities vary so much. Depending on the situation, each of the Big Five can be advantageous. For example, agreeableness is great for relationships. But if a lion were charging at you, you'd be better off with a less agreeable and more aggressive personality leaning. Because the world is so unpredictable, every aspect of each personality trait could be useful at different times, so instead of evolving a single type of personality that s first-rank for every situation, we're left with a wide variety.
An evolutionary root of personality means traits must be inherited(继承). So whether you’d like to admit it or not, much of your personality comes from your parents. In fact, for humans, about half of the differences in personality are genetic. The rest of the variability in personality comes from your environment.
Not only does your environment shape who you are, but you can, to an extent, adjust your personality to the circumstance. You can be more outgoing at a party and more agreeable at home with your family. But you can also be introverted if you need to focus on work, or aggressive when playing a competitive sport. Humans, after all, have evolved to learn from our environments.
1. Which of the following best explains the underlined word “confined” in Paragraph 3?| A．Forced. | B．Composed. | C．Devoted. | D．Limited. |
| A．A personality difference. |
| B．An environmental condition. |
| C．An evolutionary origin. |
| D．Human's relationship with animals. |
| A．Friendly. | B．Stubborn. | C．Considerate. | D．Aggressive. |
| A．Personalities can change over time. |
| B．Your environment shapes your personality. |
| C．Your genetic starting point stays you forever. |
| D．Humans have born abilities to learn from environments. |
4 . Children's average daily time spent watching television or using mobile device increased from 53 minutes at 12 months old to more than 150 minutes at 3 years old, according to an analysis by researchers at the National Institutes of Health. Children aged 7 were more likely to spend the highest amount of screen time if they had been in bad home-based childcare or were born to first-time mothers.
“Our results indicate that screen habits begin early,” said Edwina Yeung, an investigator in National Institute of Child Health and Human Development (NICHD), “This finding suggests that interventions to reduce screen time could have a better chance of success if introduced early.”
In the research, mothers of 4,000 children responded to questions on their kids' media habits when they were 12, 18, 24, 30, and 36 months of age.
The American Academy of Pediatrics recommends avoiding digital media exposure for children under 18 months of age, introducing children 18 to 24 months of age to screen media slowly, and limiting screen time to an hour a day for children from 2 to 5 years of age. In the current study, researchers found that 87% of the children had screen time exceeding these recommendations. However, while screen time increased throughout infancy, after 8 years of age, screen time fell to under 1. 5 hours per day. The researchers believe this decrease relates to time consumed by school-related activities.
The study authors classified the children into two groups based on how much their aver- age daily screen time increased from age 1 to age 3. The first group, 73% of the total, had the lower increase, from an average of nearly 51 minutes a day to nearly an hour and 47 minutes a day. The second group, 27% of the total, had the higher increase, from nearly 37 minutes of screen time a day to about 4 hours a day. Higher levels of parental education were associated with the lower odds of inclusion in the second group.
1. Which of the following is a reason for children's addiction to the media?| A．Low economic level. | B．Poor family education |
| C．The media's attraction. | D．The shortage of parents' love. |
| A．To stop children using the media. | B．To help parents care for children well |
| C．To reduce children's screen time earlier | D．To increase intervention to children |
| A．By giving some examples. | B．By showing some data. |
| C．By analyzing some reasons. | D．By concluding some results. |
| A．Probability. | B．Price. | C．Cost. | D．Income. |
5 . Liu Xiangping, a Chinese-Canadian artist and stamp designer, recalls his remarkable experiences in designing the stamps which develop friendship between China and Canada.
It was 1997, the year when Hong Kong was returned to China, and Canada Post, along with the then-Hong Kong Postal Administration and China, celebrated the Chinese New Year with a stamp.
In January 2017, special 45-cent stamp designed by Liu and two other Chinese Canadian artists was issued. Since then, Canada Post has been issuing zodiac(属相) stamp for the Chinese Lunar New Year each year. “Many traditional customs related to the Chinese New Year are indeed transnational(跨国的). They are beyond political and cultural differences. They powerfully reflect the close connections of the overseas Chinese to their ethnic roots,” Liu said.
Liu said that what he was most proud of last year was the creation of a stamp for China Post on the theme of fighting the COVID-19 pandemic.
When China Post issued a set of special stamps in 2003 to mark the victory over SARS, Liu was one of the designers.
In January 2020, Liu left Toronto for Beijing. With the influence of COVID-19 drawing the attention of the entire country, China Post invited him once again to be one of two chief designers of a set of anti-pandemic-themed stamps.
On May 11, 2020, China Post issued the two stamps. One featured the phrase “Pursue Together, Combat the Pandemic” to pay admiration and respect to the Chinese people in the fight against the virus. Liu said the most important principle for the designs is to present the Chinese spirit of solidarity(团结) as well as that of human nature in tough times. “I tried to express the sense of perseverance, anxiety and sorrow at the same time through people’s eyes,” Liu said.
To memorize the centennial(百年纪念) of Norman Bethune’s birth and his accomplishments, Canada and China jointly issued a pair of commemorative stamps in 1990. Bethune devoted his life to medicine and humanitarianism in China in the late 1930s. Jean Morin and Wanda Lewicka of Canada designed the stamps, and Liu illustrated(加插图)them.
“The stamps are the product of close cooperation and cultural exchanges between Canada and China. They symbolize the fundamentals(基本原则) of the friendship between the two countries,” said Liu. “We’ll never forget that Chinese and Canadian people were committed to the common values of justice and peace in WWⅡ.”
1. When did Canada Post begin issuing a zodiac stamp for the Chinese Lunar New Year?| A．In 1997. | B．In 2003. | C．In 2017. | D．In 2020. |
| A．Wonderful. | B．Difficult. | C．Busy. | D．Common. |
| A．He designed a stamp to celebrate the Chinese New Year with a stamp in 1997. |
| B．He designed a stamp to honor the Chinese people fighting against the pandemic |
| C．He designed a set of special stamps in 2003 to mark the victory over SARS. |
| D．He designed the stamps to memorize the centennial of Norman Bethune’s birth. |
| A．Stamps develop friendship between Canada and China. |
| B．Stamps show cultural exchanges between Canada and China. |
| C．Liu Xiangping is a Chinese-Canadian artist and stamp designer. |
| D．Liu Xiangping enjoys designing stamps reflecting Chinese customs. |
6 . While it's not impossible for birds to fly in the rain, they usually choose not to. You may see birds fly for a few seconds in poor weather, but most of them prefer to stay put on rainy days.
Why does rain make it harder for birds to fly? You might imagine that moving through the air while being pelted by raindrops would be pretty unpleasant. However, it's not the rain itself that makes flying difficult. Instead, birds are influenced by the drop in the air pressure that comes with most rainstorms. When pressure drops, the air is less thick, which makes it harder for birds to fly. Moving through the sky in areas of low air pressure takes a lot of energy.
Most birds need to eat several times a day—rain or no rain. Luckily, most birds' feathers（羽毛）are highly waterproof（防水的）, protecting the skin beneath. Many birds can also make oil that they can spread over their feathers to further protect themselves from the rain. Most birds don't like rain. In fact, in a 2010 study, a team of researchers studied birds living in a Costa Rican rainforest. They found that the birds had higher levels of stress hormone（应激激素）on rainy days. That may not surprise you. After all, many animals feel stressed out during storms. Pet owners often find that rain and thunder make their animals nervous. Some animals are so strongly influenced by nature that they almost seem to forecast the future.
No one really knows how many birds die during a storm or series of storms. But the number is certainly higher than usual. They fly into trees or windows; they get lost over the ocean or a large lake; their food sources are made more difficult to get but, at the same time, they need more food to get warm. However, if rain continues for some time, birds will have to challenge the storm.
1. What makes it harder for birds to fly in the rain?| A．The wet air. | B．Food shortage. |
| C．Raindrops. | D．The low air pressure. |
| A．Cleaned. | B．Hit. |
| C．Frightened. | D．Protected. |
| A．Why birds can fly in the rain |
| B．How birds are influenced by rain. |
| C．How birds survive long rainy days. |
| D．Why birds' feathers are waterproof. |
| A．Birds will develop the ability to fly in the rain |
| B．Birds fly only when necessary on rainy days. |
| C．Birds have nowhere to hide in rainstorms. |
| D．Birds need less food on rainy days. |
7 . “The world’s loneliest elephant” Kaavan, has reached Cambodia—on a flight of over 4,000km from Pakistan—and will spend his days at the Cambodia Wildlife Sanctuary in the country’s northwest.
Animal experts began the task of airlifting Kaavan on November 29. His departure from Pakistan marks the end of a campaign led by local activists and American singer and actress Cher, who has been campaigning for the elephant’s freedom since 2016. She is the co-founder of the NGO Free The Wild, which has played an important role in Kaavan’s relocation. Earlier in October, a veterinarian(兽医) from Four Paws, Dr Amir Khalil, took the responsibility of moving Kaavan, whose rescue has been described as “the heaviest one” the organisation has undertaken. Cher tweeted to thank Pakistan’s prime minister for making the rescue possible.
A special crate(板条箱) was especially built for the elephant, who weighs more than five tons and is more than three metres high. Kaavan was also trained by an elephant expert for several weeks to make sure that he could enter the crate safely. On the journey, Kaavan was accompanied by wildlife veterinarians and over 200kg of food. Kaavan is also Pakistan’s last Asian elephant and with his departure, the zoo where he was housed for over three decades may close soon, because many animals have been reported missing or dead in recent years. The zoo has repeatedly made headlines for its increasingly awful conditions.
According to the animal welfare organisation Four Paws, Kaavan came to the Pakistan zoo 35 years ago and shared his room with Saheli. After his “only companion” Saheli died in 2012, Kaavan was reported to be listless and even started showing signs of mental illness.
Luckily, Kaavan has found his relocation. Cambodian deputy environment minister Neth Pheaktra said, “Our zoo is pleased to welcome Kaavan. No longer will he be the world’s loneliest elephant. We expect to breed Kaavan with local elephants. This is an effort to save the gene.”
1. What can we learn from paragraph 2?| A．Kaavan is the heaviest elephant in the world. |
| B．Joint efforts have been made to rescue Kaavan. |
| C．Veterinarians tried to cure Kaavan of its diseases. |
| D．Experts helped Kaavan to adapt to his new home. |
| A．Because Cambodia had more experienced experts. |
| B．Because his living conditions went from bad to worse. |
| C．Because it served as the bond between the two countries. |
| D．Because the Pakistan zoo he stayed in was to shut down. |
| A．Depressed. | B．Useless. | C．Dependent. | D．Missing. |
| A．He will get freedom. |
| B．He will be well trained. |
| C．He may live a long life. |
| D．He may have the next generation. |
8 . Forty-nine years ago, on April 22,1970, twenty million Americans took to the streets to voice their concern about the deteriorating environment. The movement led to Earth Day.
Unfortunately, our planet is in worse shape now than it was when Earth Day was first celebrated. The good news is that it’s still not too late to reverse (转变) climate change if we all do our part. This Earth Day, take the first step towards helping our planet by participating in one of these fun activities.
NASA is putting our planet up for adoption so you and your friend can claim a portion of the planet as your own. The space agency has divided the globe into 64,000 sections, each about 55 miles wide. All you have to do is type your name into NASA’s “Adopt the Planet” site to claim a certificate that will give you the location of your slice of paradise (天堂) complete with details of its environment. NASA hopes that this exercise will stimulate interest and care in our planet.
Search giant Google is also trying to engage the public with an updated Google Earth focused around Earth Day events. Through a new Voyager feature, users will be able to discover stories from around the world, learn about new places by reading “Knowledge Cards” and send postcards.
If you happen to be anywhere near the nation’s capital on April 22, join the millions that are expected to participate in the Earth Day March at the National Mall. The mission of the event that will feature guest speakers and musical performances is to mobilize (动员) citizens into taking action by promoting this year’s Earth Day theme: climate and environmental science literacy.
While participating in the above-mentioned activities is a great idea, it is just the beginning. All that is required are small lifestyle changes. Planting a tree or two, going meatless just one day a week, or switching your plastic water bottle for a reusable one will go a long way to help reverse the damage we have caused.
1. The underlined word “deteriorating” is the closest in meaning to ________.| A．cleaner | B．better |
| C．worse | D．colder |
| A．air quality | B．ancient history |
| C．local customs | D．tourist attractions |
| A．They can create “Knowledge Cards” online. |
| B．They can discover stories from around the world. |
| C．They can receive postcards coming from Google. |
| D．They can adopt a slice of paradise in the world. |
| A．dream big | B．fly high |
| C．go meatless | D．start small |
