1 . The quiz tries to test non-native English speaker's vocabulary size. New results show the largest proportion of participants know 4,500 words （in the range from 4,250 to 4,749）, with the median vocabulary size of 7,826* under the influence of the following factors.
Factors
Academic performance: In class, how about your homework, study, exam, logic, etc.?
Classroom participation: In class, how much did you participate, talking and asking questions? Natural ability: In class, how much do you feel about learning English? Is it easy or difficult? Outside of class: How much do you use English in real life, learning things outside of class? Being abroad: Did you travel to English-speaking countries? How much time did you spend?
Findings
Academic performance helps, up to doubling your vocabulary size. Classroom participation matters too, giving you up to a 50% increase in vocabulary. Outside of class is the biggest difference. Students who do lots of things in English outside of class have more than twice the vocabulary of those who don't. Being abroad brings the average student from around 7,000 to 10,000 words.
Be aware that the results above are suggestive only. More research will tell.
1. What is the vocabulary size of most participants in the quiz?
| A．4,500. | B．4,250. | C．4,749 | D．7,826 |
| A．Academic performance. | B．Being abroad. |
| C．Outside class activities. | D．Classroom participation. |
| A．An English poster. | B．An English dictionary. |
| C．A notice about a quiz. | D．A survey of English learning. |
2 . New parents who clean their homes very often to protect their babies from bacteria and other organisms might cut back their efforts.
A new study suggests high levels of contact with cleaning products are linked to an increased risk of the childhood breathing condition known as asthma (气喘).
Researchers asked a group of parents how often they used 26 common household cleaners during their babies’ first three to four months of life. By age three, the children who had come in contact with cleaning products the most were more likely to be diagnosed with asthma. The researchers said children who had a lot of contact with cleaners were 37 percent more likely to have asthma than children with the least contact. The study also found a lot of exposure to cleaning products caused children to be 35 percent more likely to have chronic difficulty breathing. In addition, they were 49 percent more likely to have chronic allergies.
Tim Takaro, who helped lead the study, suggested that parents should question the belief that their home is clean only if it smells like chemical-based cleaning products. He also advised them to look for products free of substances like chemical colors. Besides, they should consider natural cleaning products instead of chemical ones.
The American lung Association recommends avoiding cleaning products that contain volatile (易挥发的) organic substances and other irritants (刺激物). But companies in Canada and the United States are not required to list all the chemicals in cleaning products. Some products labeled as environmentally friendly, or "green", may contain harmful substances.
Elissa Abrams, a doctor with the University of Manitoba, admitted the effects of cleaning products are not well understood. But she believed these products and the chemicals they contain act as irritants to growing children "The take-home message is that parents should be careful with cleaning products they use in the home", she added.
1. What is the third paragraph mainly about?| A．The suggestions on using cleaning products. |
| B．The parents’ opinions of household cleaners. |
| C．The conduct of the study and the findings. |
| D．The reason for using cleaning products. |
| A．Have a full understanding of cleaning products. |
| B．Keep their home free of all kinds of cleaning products. |
| C．Use natural cleaning products rather than chemical ones. |
| D．Make their homes smell like chemical-based cleaning products. |
| A．They are environmentally friendly without any harm. |
| B．They are asked to list all the chemicals contained. |
| C．They are free of irritants if labeled "green". |
| D．They are not always safe to be used. |
| A．Arts & Culture. | B．Lifestyle & Health. |
| C．Life & Technology. | D．Climate & Environment. |
3 . A teenager from the UK almost died because of an addiction to unhealthy exercise.
Lisa Fouweather, 19, was so addicted to working out that she ran half marathons before breakfast. She started to practice running, hoping to become excellent at her running club, but quickly became addicted.
She was hardly eating to keep in shape. The teen’s meals would only include a few pieces of food from her “safe foods” list which was mainly fruit and vegetables. She would avoid anything containing sugar or fat. “I would throw my orange juice and bread out of the window when my parents left the room,” she said. At one point, her weight dropped to just 75 pounds — around 34 kg.
This helped to improve her running in the short-term when, in fact, her whole life was falling apart. It affected her education as she would turn up late to school every day to finish her morning running. She said, “Six-mile runs became half marathons, all on an empty stomach before breakfast. Upon my return, I would eat only fruit.”
However, although warned by her parents, Lisa refused to admit she had a problem and wouldn’t give up her way of working out until one day she had a heart attack after her running and was rushed to hospital, where she was diagnosed with anorexic (厌食症) and banned from exercise. “I was told that I could have died because my heart was under great pressure.” She was given dieting advice by doctors to help treat her eating disorders. Thanks to hard work and professional help, she managed to put a stop to her extreme exercise and dieting and has been in recovery for nearly three years.
Lisa said, “I want people who are going through the same problem as I did to know that there is help and support out there, and don’t wait until you’re at breaking point to seek that help.”
1. Why did Lisa start practicing running at first?| A．To become great at the running club. |
| B．To keep in shape. |
| C．To help her with her diet. |
| D．To improve her education. |
| A．She ran half marathons on an empty stomach. |
| B．She had an unhealthy way of eating. |
| C．She didn’t get any warning from others. |
| D．She wouldn’t quit her wrong way of exercise at first. |
| A．There are many people going through the same problem as Lisa did. |
| B．Lisa can provide help and support to people with the same problem. |
| C．You can wait for help if you’re going through the same problem. |
| D．People with the same problem should ask for help in time. |
| A．Science. | B．Technology. |
| C．Health. | D．Nature. |
4 . China’s Chang’e 5 mission to the moon was completed in less than a month after blasting off (点火起飞). A capsule containing samples of lunar (月球的) rocks and soil collected from the surface of our natural satellite landed in Inner Mongolia, where it was taken back for study.
Chinese broadcaster CGTN reported that the capsule had landed back to Earth just after 10am Dec. 16. Search crews were out in the freezing pre-dawn Hours looking to find back the capsule from the snowy grassland during temperatures well below zero. Aerial images (航拍影像) appeared to show the capsule safely resting on the ground.
China's National Space Administration announced on Thursday, Dec. 3, that its ascent module (上升器) had blasted off from the top of the mission's lunar lander, carrying samples of rock and soil it dug from the lunar surface. It then met with an orbiter circling the moon. The pair made the return trip to Earth where the capsule carrying the samples was sent on its way for a hot and fast going down through our atmosphere only to land on the frozen ground.
The mission lifted off from China on Nov. 23 and landed on the moon on Dec. l. Videos from Chinese media showed the lander’s robotic arm hard at work during its short shift on another world. During its stay, Chang'e 5 also sent back images of a lunar plain of relatively young volcanic moon rock. The image shows both distant hills and how the feet of the lander dug into the soft surface of the moon as it touched down. Enlarging the foot of the lander in particular providers a real sense of the dry, desert-like lunar surface. When the samples were collected, they have been the first pieces of the moon to be returned to our planet since the 1970s.
1. What is the mission of Chang'e 5?| A．Collecting samples of rocks and soil from the moon. |
| B．Taking the samples from the earth to then moon. |
| C．Sending a man-made satellite to orbit the moon. |
| D．Sending a manned spaceship to make a lunar landing. |
| A．The capsule. | B．The lunar lander. |
| C．The ascent module. | D．The orbiter. |
| A．The Earth. | B．A spaceship. |
| C．Chang'e 5. | D．The Moon |
| A．Entertainment. | B．Science. | C．Education. | D．Health. |
5 . Researchers at the DogStudies lab at the Max Planck Institute for the Science of Human History have shown that dogs may possess some metacognitive (元认知) abilities. Specifically, when they do not have enough information to solve a problem, they will actively look for more information, similarly to primates (灵长类).
In a recent study, project leader Julia Belger explored whether dogs have metacognitive abilities. To test this, the researchers designed a device involving two V-shaped fences. A reward, either food or a toy, would be placed by one researcher behind one of the two fences while another researcher held the dogs. In some cases, the dogs could see where the reward was placed, while in others, the dogs could not. The researchers then analyzed how frequently the dogs looked through the gap in the fence before choosing an option.
The researchers found that the dogs did check significantly more often for the reward when they had not seen where it was placed. These results show that dogs do tend to actively seek extra information when they have not seen where the reward is concealed.
The results did not allow the researchers to say definitively whether dogs possess meta-cognition, though they displayed some evidence for it. Julia said, “For humans, vision is an important information gathering sense. In this case, our experiment was based on a checking action relying on sight, but the dogs probably also used their sense of smell when checking through the gap. We know that smell is very important to dogs and we could see that they were using it.”
Julia added, “In future, we would like to develop an experiment to investigate under what circumstances dogs decide to use their sense of smell versus sight. This may give us additional insights into their information seeking abilities.”
1. What ability may dogs have according to the study?| A．To offer information like primates. | B．To use their skills to find more food. |
| C．To seek information to solve a problem. | D．To ask for help before choosing an option. |
| A．Decorated. | B．Hidden. | C．Produced. | D．Purchased. |
| A．Uncertain. | B．Friendly. | C．Negative. | D．Critical. |
| A．Environment and technology. | B．Humans and nature. |
| C．Literature and culture. | D．Society and life. |
6 . Flu season generally dies down in March and April, but will the coronavirus( 冠状病毒) go with it? Whether the coronavirus that's quickly spreading around the world will follow the flu season and fade away with spring's arrival is unsatisfyingly uncertain. And many scientists say it's too soon to know how the dangerous virus will behave in warmer weather.
Dozens of viruses exist in the coronavirus family, but only seven afflict (折磨) humans. Four are known to cause mild colds in people, which are common, while others are more novel, deadly, and thought to be transmitted from animals like bats and camels. Health officials have labeled this new virus SARS-CoV-2 and its disease COVID-19. The prospect that summer could delay a pandemic is tempting. Earlier this year, Donald Trump tweeted about China’s efforts to contain the virus, saying they would be successful, “especially as the weather starts to warm.”
Viruses that cause influenza or milder coronavirus colds do tend to subside in warmer months because these types of viruses have what scientists refer to as “seasonality,” so the president's comments have some scientific backing. But it's highly uncertain that SARS-CoV-2 will behave the same way. Those currently studying the disease say their research is too early to predict how the virus will respond to changing weather.
“I hope it will show seasonality, but it's hard to know,” says Stuart Weston, a researcher at the University of Maryland, where the virus is being actively studied. As of Tuesday morning, more than 800,000 coronavirus cases had been confirmed in 74 different countries, with experts saying the disease is likely to keep spreading.
And relatively recent research suggests that dry, cold air may also help viruses stay unbroken in the air or travel farther as they become airborne.
Scientists assume that low humidity, which often occurs in winter, might weaken the function of the mucus(粘液)in your nose, which your body uses to trap and drive foreign bodies like viruses or bacteria away. Cold, dry air can make that normally thick mucus drier and less efficient at trapping a virus.
1. When does flu season usually die down?| A．Early autumn. | B．Late Summer. | C．Late Spring. | D．Mid Summer. |
| A．Frightening | B．Decent | C．Critical | D．Unfamiliar |
| A．The reason why people easily get viruses in winter. |
| B．If you stay at a warm room, you can't get any viruses. |
| C．Viruses do agree with the dry and cold atmosphere in winter. |
| D．The low temperature in winter is the main reason for viruses to spread. |
| A．A health magazine. | B．A biology research. |
| C．An educational paper. | D．A medical report. |
7 . Koalas live in the eucalyptus （枝树）forests of southeastern and eastern Australia. They rely on the eucalyptus tree for both habitat and food. In fact, they seldom leave these trees. When not sleeping, they're usually eating. They can eat more than a pound of eucalyptus leaves a day. Eucalyptus is poisonous, so the koala's digestive （消化的）system has to work hard to digest it, breaking down the poisons and taking in the limited nutrients （营养）.That's why koalas sleep for 18 to 22 hours a day — they get very little energy from their diet.
Koala numbers decreased in the late 19th and early 20th century from hunting for their fur. Now they face serious threats from habitat loss. Land clearing and bush fires-especially the 2019-2020 Australia Bushfire Season-have destroyed much of the forest they live in. Koalas are easy to be affected by climate change. Increasing carbon dioxide in the atmosphere is decreasing the nutritional quality of eucalyptus leaves and causing longer, more serious droughts and wildfires. In response to drought, koalas are forced to stop sleeping and come down from the trees to find water, putting them at a higher risk of being killed.
Koalas have been identified by the Australian government as one of the 113 animals requiring urgent （紧急的）help. Ensuring there's the right kind of forest for them to return to is extremely urgent. State governments should create new koala reserves and persuade landowners not to cut down eucalyptus trees. Meanwhile, getting the public to understand koalas' living habits and their health will throw light on koala biology, which helps to develop plans to better protect the species.
1. What can we learn about koalas?| A．They like moving around very much. |
| B．They have developed smart survival skills. |
| C．They can be found everywhere in Australia. |
| D．They often got ill while eating eucalyptus leaves. |
| A．Koalas' newly-formed habits. | B．Koalas' decreasing population. |
| C．The potential threats to Koalas. | D．The outcomes of increased carbon dioxide. |
| A．Conduct the research on their living habits. |
| B．Make sure they can have their habitat back. |
| C．Realize that they are sensitive to climate change. |
| D．Educate people about the awareness of protecting them. |
| A．A nature magazine. | B．A travel brochure. |
| C．A sports newspaper. | D．A health magazine. |
8 . Standing on the ruins（废墟）after the fire where his house had been, Peter Ruprecht admitted that he was not sure how or when to rebuild. He was still shocked by what Australia's increasingly changeable climate had already delivered: first a drought, then a destructive bush fire, then a foot of rain from a storm.
"It's unstoppable," said Mr. Ruprecht, a former dairy farmer. "We speak about the warmth of Mother Nature, but nature can also be vicious and wild and unforgiving."
Australia's' hellish（地狱的）fire season has eased（缓和）, but its people are facing more than a single disaster. With floods destroying homes not far from where fires recently spread, they are facing a cycle of what scientists call "compound extremes": one climate disaster strengthening the next.
Warmer temperatures do more than just dry out the land. They also heat up the atmosphere, which means clouds hold more moisture（水汽）for longer periods of time. So droughts get worse, giving way to fires, then to heavy rains that the land is too dry to absorb.
Many Australians in disaster zones complain that their government, after ignoring climate change for years, has not yet to draw up recovery plans that are clear and that take future threats into account.
At the same time, the economic costs of a changing climate are rising quickly. Philip Lowe, the governor of the Reserve Bank of Australia, warned recently that Australia was already paying a price, and that it would only go up.
1. Why Peter Ruprecht is mentioned in the beginning?| A．To arouse readers' pity. | B．To introduce the topic. |
| C．To stress the problem. | D．To call on readers to help. |
| A．grateful | B．advanced | C．responsible | D．forcible |
| A．Government inaction. | B．Warmer temperature. |
| C．The lack of money. | D．No recovery plans. |
| A．guidebook. | B．A travel journal. | C．A news report. | D．A book review. |
9 . The native Americans, the people we call the “Indians”, had been in America for many thousands of years before Columbus arrived in 1492. Columbus thought he had arrived in India, so he called the native people “Indians”.
The Indians were kind to the early settlers. They were not afraid of them and they wanted to help them. They showed the settlers the new world around them. They taught them about the local crops like sweet potatoes, corn and peanuts. They introduced the Europeans to chocolate and to the turkey and the Europeans did business with the Indians.
But soon the settlers wanted bigger farms and more land for themselves and their families. More and more immigrants were coming from Europe and all these people needed land. So the Europeans started to take the land from the Indians. Naturally, when the whites started taking all the Indians’ land, the Indians started fighting back.
But the whites were stronger and cleverer. Slowly they pushed the Indians into those parts of the continent that the whites didn’t want- the parts where it was too cold or too dry or too mountainous to live comfortably. By 1875 the Indians were living in special places called “reservations”. But even here the whites took land from them- perhaps the whites wanted the wood, or perhaps the land had important minerals in it, or they even wanted to make national parks there. So even on their reservations the Indians were not safe from the whites.
There are many Hollywood films about the fight between the Indians and the whites. Usually in these films the Indians are bad and the whites are good and brave. But was it really like that? What do you think? Do you think the Indians were right or wrong to fight against the whites?
1. Why did Columbus call the native people “Indians”?| A．Because he thought he had arrived in India. |
| B．Because he liked Indian culture very much. |
| C．Because he knew they were from India. |
| D．Because he was an Indian himself. |
| A．The Indians gave up their land willingly. |
| B．The settlers wanted to buy land from the Indians. |
| C．The whites even wanted more land on Indians’ reservations. |
| D．The Indians were stronger and cleverer than the white settlers. |
| A．the Indians are usually beautified in the films |
| B．the author is doubtful about what the films show to us |
| C．films about fights are the most popular ones in the market |
| D．films about the fight between the Indians and the whites are very limited |
| A．entertainment | B．history | C．economy | D．industry |
10 . Most Asian people are familiar with pickled vegetables. Chinese pickles, which vary from regions, play a very important part in Chinese daily life. Not only are Chinese pickles easy to make and keep at home, out also they are an excellent side dish. These pickles go great with a congee meal(粥). Here we’ll make the delicious Chinese pickles together.
Ingredients
◇ 1 carrot with fantastic taste and 2 cucumbers. Don’t use the regular cucumbers, which are called Garden Cucumbers, as they are too watery and pretty tasteless and have lots of seeds you have to get rid of.
◇ a Glass Jar for pickling, a teaspoon of sea salt, a cup of Rice Vinegar, a cup of Raw Sugar and 2 slices ginger.
Directions
Peel the carrot and wash the cucumbers. Slice everything into approximately 2 inch lengths by 1/4 inch thickness. Put into a large bowl with salt and shake. Let stand for at least l/2 hour. Remove squeezed water until dry as possible. Place one of the ginger slices on bottom. Pack the vegetables into your pickling jar. Put the other ginger slices on top. Mix the sugar into the vinegar in a bowl and shake until the sugar is melted. Pour over the vegetables until covered. Pour in a bit more vinegar to top up if necessary. Close jar and put in the fridge overnight.
It’s ready to eat the next day but the flavor will improve as time goes by.
Let’s call it a day. See you this time tomorrow.
1. What can we know about Chinese pickles?| A．They are a Chinese meal similar in different provinces. |
| B．They are an Asian an food easy to make but difficult to keep. |
| C．They are a side dish made with Garden Cucumbers. |
| D．They are a great match for congee meals. |
| A．Drown the vegetables with sugar and vinegar. |
| B．Cover the vegetables with ginger slices. |
| C．Squeeze the water from the vegetables. |
| D．Close the jar and put in the fridge. |
| A．A food programme. | B．A gardening broadcast. |
| C．A cooking magazine. | D．A DIY reference book. |
