1 . 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. |
2 . Just one in five workers use their lunch break to actually eat every day-with most using the time to catch up on personal things and play social media instead. A study of 2,000 UK professionals found 79% will have their food as they work, so they can use their “lunch” to do other things. Watching YouTube videos, walking the dog and playing with apps on their phones are also among some of the ways people spend their lunch break.
The study, conducted by Samsung KX, is designed to inspire people to reclaim their lunch breaks. “We all need to make time for ourselves and our research has shown how few really are,”said Tanya Weller, director of Samsung Showcase KX. “It’s easy to get caught up in a piece of work, but people aren’t even giving themselves a moment to eat—let alone do anything else.”
According to the study, approximately 40% of respondents would like more time to pursue hobbies and interests during their lunch break, as they feel work has completely taken over. But 67% will frequently skip their meal altogether, with the average person only managing to take a proper break from their work three days a week.
But 37% said they don’t know what to do with their time, so they just don’t bother to take a lunch break. It also showed that 43% will usually spend their allocated break time at their desk, with just a fifth stepping away to rest on the sofa. As a result, around 70% confessed to checking work emails or taking calls during their lunch time, rather than enjoying themselves. Participants said they would prefer to spend their downtime watching episodes of their favourite TV shows, playing computer games or even getting creative by painting, drawing or making music on a device.
1. What will most of people during their work do ?| A．Eat food. | B．Watch videos. |
| C．Check the email. | D．Download some apps. |
| A．Make fun of. | B．Make use of. |
| C．Come up with. | D．Keep up with. |
| A．They feel their life is fully occupied. |
| B．They find their good jobs in their free time. |
| C．They expect to have no more time to have lunch. |
| D．They think their work is too tiring to go out to play. |
| A．They have fun. | B．They’re fond of working. |
| C．They send emails. | D．They don’t know what to do. |
3 . I stood behind the curtain, my hands shaking. As I listened to the crowd laugh at the host's jokes, I thought about why I believed I could do that. Two months earlier, I had signed up for improv（即兴表演）classes at a local theater, along with four other graduate students.
When I first heard about the improv classes, I was torn. I feared getting on stage and performing in front of strangers. However, I knew I wanted to work as a science communicator after finishing my Ph.D., so it seemed like a perfect opportunity to improve my communication ability and gain confidence thinking on my feet.
During our first class, we learned the key concept of improv: “yes, and”. If someone says that rhinos are librarians, for example, then rhinos are librarians. We don't question the logic; we say “yes” and continue with the scene as if nothing is wrong. To do this effectively, we have to avoid second-guessing ourselves. Sometimes scenes go in unexpected directions. The best improv happens when performers stay open to different possibilities. Over time, I started to enjoy our classes. I also became better at listening and communicating clearly in the moment.
That training came in handy 6 months ago, when I was giving a seminar about my science research. An audience member surprised me with a question that didn't grow out of the information I had presented. Instead of getting perplexed, I used that approach, and it helped me find an appropriate answer.
Last year, I used that approach when dealing with confusing data. Instead of getting discouraged, I kept exploring the data and ended up identifying a new type of cell — one that wasn't behaving as expected. If I hadn't stayed open to the possibility that the results were real, I would have missed out on the most exciting finding of my Ph.D. program so far.
1. The author expected that the improv classes could help him ________.| A．gain better skills in communicating |
| B．rid his fear of appearing on the stage |
| C．recover from a mental illness |
| D．learn how to think independently |
| A．Pretending to be clever. |
| B．Understanding different scenes. |
| C．Accepting unexpected possibilities. |
| D．Asking others some questions. |
| A．Amused. | B．Confused. |
| C．Surprised. | D．Disappointed. |
| A．He failed in exploring the new cell. |
| B．He got stuck after finding unexpected data. |
| C．Science research made him more confident. |
| D．The improve skill helped him a lot in his Ph.D. studies. |
4 . If you were to throw, say, a banana peel out of your car while driving along the motorway, that would be a completely harmless action, due to the fact that it’s part of a fruit — right? Actually, no. A banana peel can take up to two years to be naturally processed, and with a third of motorists admitting to littering while driving, that’s a whole lot of discarded banana peels. An orange peel and a cigarette butt has a similar biodegrading (生物降解) term to that of a banana peel, but tin cans last up to 100 years; and plastic bottles last forever, as do glass bottles.
Despite the fact that longer-lasting materials will serve to damage the environment and its animals for longer, we can’t merely measure the severity of a certain type of rubbish by its lifetime. For example, despite having a fairly short length of biodegrading time, more than 120 tons of cigarette-related litter is discarded in the UK every day.
It’s not a cheap habit either: to keep our streets clean annually costs UK taxpayers £500 million, and when you include our green spaces, that goes up to £1 billion. So, it’s not surprising that if caught fly-tipping you could face a £20,000 fine or even jail time and, if you disposed of something dangerous, the court could give you five years to serve. Regardless of how severe these punishments might seem, however, among the reported cases only 2,000 were found guilty out of 825,000, so we still have some way to go in making sure people obey the rules.
1. What does the underlined word “discarded” in para1 mean?| A．Harmless. | B．Processed. | C．Thrown. | D．Long-lasting. |
| A．Glass bottles. | B．Tin cans. | C．Cigarette butts. | D．Banana peels. |
| A．The severity of rubbish can be measured by its lifetime. |
| B．Quite a few people were found guilty of illegally littering. |
| C．Every year UK taxpayers spend £500 million keeping streets free of dirt. |
| D．Cigarette-related litter and peels can be ignored for their fairly short lifetime. |
| A．To inform readers of different biodegrading terms. |
| B．To call for people not to litter illegally. |
| C．To encourage people to use fewer plastic bags. |
| D．To stress the importance of good behavior. |
5 . The populations of common animals are just as likely to rise or fall in number in a time of accelerating global warming as those of rare species, a study suggests.
Until recently, scientists were still accumulating data on how animal populations were shifting over time globally across the different regions of the planet.
Making use of the newly available data, a team of University of Edinburgh researchers studied nearly 10000 animal populations recorded in the Living Planet Database between 1970 and 2014 to provide a new perspective on animal population change. These include records of mammals, reptiles, sharks, fish, birds and amphibians.
The team found that 15 percent of all populations declined during the period, while 18 percent increased and 67 percent showed no significant change. Amphibians were the only group in which population sizes declined, while birds, mammals and reptiles experienced increases. The overall decline in amphibians makes them a priority for conservation efforts, researchers say, as their loss could have knock-on effects in food chains and wider ecosystems.
Gergana Daskalova, of the University of Edinburgh’s School of GeoSciences, who led the study, said, “We often assume that declines in animal numbers are prevalent everywhere. But we found that there are also many species which have increased over the last half of a century, such as those which do well in human-transformed landscapes or those which are the focus of conservation actions.”
Dr. Isla Myers-Smith, also of the School of GeoSciences, who co-authored the study, said, “Only as we bring together data from around the world, can we begin to really understand how global change is influencing the biodiversity of our planet.”
1. With the global temperature rising, what happens to the animals?| A．Rare animal species tend to decline. |
| B．Common animal species tend to increase. |
| C．Global wanning is accelerating with the loss of animal species. |
| D．The population of common animals changes just like rare ones. |
| A．By analyzing existing information. | B．By studying animals，behavior. |
| C．By comparing different studies. | D．By recording the data of animals. |
| A．Sharp. | B．Common. | C．Steady. | D．Relative. |
| A．Objective. | B．Optimistic. | C．Subjective. | D．Pessimistic. |
6 . The weather is getting hotter. You are thirsty playing basketball or riding home from school. A cold drink may be just the thing. But be careful what you are drinking. Something that looks cool may not be good for your health. There are plenty of “energy drinks” on the market. Most of them have beautiful colors and cool names. The lists on them tell you they are helpful to your health. Sounds great!
But after a careful check you may find that most energy drinks have lots of caffeine(咖啡因) in them. These drinks are especially aimed at young people, students, busy people and sports players. Makers sometimes say their drinks make you better at sports and can keep you awake.But be careful not to drink too much. Caffeine makes your heart beat fast. Because of this, the International Olympic Committee(OC) has limited(限制) its use. Caffeine in most energy drinks is at least as strong as that in a cup of coffee or tea. Possible health dangers have something to do with energy drinks. Just one box of energy drink can make you nervous, have difficulty sleeping and can even cause heart problems.Scientists say that teenagers should be discouraged from taking drinks with a lot of caffeine in them.
1. Many people like drinking energy drinks because of the following EXCEPT that______.| A．they have beautiful colors and cool names |
| B．they have lots of caffeine |
| C．they can keep them awake and better at sports |
| D．they are said to be helpful to health |
| A．Encouraged. |
| B．Stopped. |
| C．Helped. |
| D．Disliked. |
| A．Advertisements are important in getting people to buy energy drinks. |
| B．Energy drinks are helpful to teenagers' study. |
| C．Sports players need to drink a lot of energy drinks. |
| D．Energy drinks are especially aimed at teenagers. |
| A．What's the Use of Energy Drinks? |
| B．Who Can Drink Energy Drinks? |
| C．What's That in Energy Drinks? |
| D．Why Can't We Buy Energy Drinks? |
7 . Yangsigang Yangtze River Bridge, the double-deck suspension (悬浮) bridge with the longest span in the world, opened to traffic on Tuesday after five years’ construction, according to a statement from the constructor.
It is reported that the bridge is 4. 13 kilometers long, with 12 lanes in both directions on the main I bridge. It is a long-span suspension bridge with the largest volume in the world, China Railway Major Bridge Engineering Group said. The bridge connects the Hanyang and Wuchang and its opening will ameliorate the urban expressway system, relieve traffic pressure across the river, and drive development in the area, according to the company.
On both sides of the upper deck of the bridge, there is a two-meter-wide footpath, with eight rest and sightseeing areas, where people can enjoy the river scenery. The lower level is designed with two non-motorized lanes, each 2. 5 meters wide. A 1. 5-meter wide walkway is also a feature of each side of the floor so pedestrians (行人) can walk on the lower level without getting caught in the rain.
Chief designer of the bridge, Xu Gongyi, said, “Considering navigation and traffic volume, the main span of the bridge is 1, 700 meters, which is the second-largest in the world and also the largest in bridges of double-deck structure.”
According to Luo Ruihua, project manager of the bridge, the Yangsigang Yangtze River Bridge has set several records in the process of its construction. The designed tension of each of the two main cables (钢索) is 65, 000 tons.
From 2014 to 2019, builders have shown the world the speed of China. The bridge not only enhances Wuhan’s reputation as a “bridge museum”, but also represents a super project of a new era.
1. What does the underlined word “ameliorate” in paragraph 2 mean?| A．Keep. | B．Start. | C．Improve. | D．Show. |
| A．By giving examples. | B．By making comparisons. |
| C．By describing its principles. | D．By using data. |
| A．It will attract many foreigners to Wuhan. |
| B．It is friendly to pedestrians. |
| C．The cost of its construction is low. |
| D．It is the longest bridge of the world. |
| A．Negative. | B．Admiring. | C．Uncertain. | D．Grateful. |
8 . I have always found the Chinese to be a very polite people. In particular, Chinese frequently compliment (称赞) foreign friends on their language skills, knowledge of Chinese culture, professional accomplishments, and personal health. Curiously, however, Chinese are as loath to accept a compliment as they are eager to give one. As many of my Chinese friends have explained, this is a sign of the Chinese virtue of modesty.
I have noticed a difference, though, in the degree to which modesty is emphasized in the United States and China. In the US, we tend to place more emphasis on “seeking the truth from fact”, thus, Americans tend to accept a compliment with gratitude.
Chinese, on the other hand, tend to reject the compliment, even when they know they deserve the credit or recognition which has been awarded them. I can imagine a Chinese basketball fan meeting Michael Jordan of the Chicago Bulls. He might say, “Mr. Jordan, I am so happy to meet you. I just want to tell you, you are the best basketball player in the world; you’re the greatest!” to which Jordan would probably respond, “Thank you very much. I really appreciate it! I just to try to do my best every time I step on the court.” If an American met Deng Yaping, China’s premier pingpong player, he might say much the same thing: “Ms. Deng, you’re the best!” but as a Chinese, Deng would probably say, “No, I really don’t play all that well. You’re too much kind.”
Plainly, Americans and Chinese have different ways of responding to praise. Ironically, many Americans might consider Ms. Deng’s response the less modest, because it is less truthful—and therefore less sincere. Americans generally place sincerity above manners; genuine gratitude for the praise serves as a substitute for protestations of modesty. After all, in the words of one of my closest Chinese friends, modesty taken to the extreme is pride.
1. What does the underlined word “loath” in paragraph 1 refer to?| A．Polite. | B．Uncertain. | C．Curious. | D．Unwilling. |
| A．To note they do as much as they can each time they play against others. |
| B．To remind readers they are the best players in basketball and table tennis. |
| C．To explain they deserve the credit or recognition for their great contributions. |
| D．To show they as Chinese and Americans are different in accepting praise. |
| A．They think sincerity matters the most. | B．They think her reply is against the fact. |
| C．They think she is too modest to believe. | D．They think manners is more important. |
| A．Education. | B．Sports. | C．Culture. | D．People. |
9 . A teenager of 17 walks into a corner store and grabs a Coca-Cola, but the cashier refuses to sell it to him because he is underage. That rule is expected to soon become reality in parts of Mexico, as lawmakers in several states push legislation (立法)to keep junk food away from children. know it can sound a bit difficult but we have to take action now," says Lopez, a lawmaker in Oaxaca's Congress.
More than 70,000 Mexicans have died from COVID-19, the world's fourth-highest recorded death toll, tracked by Johns Hopkins University. 89% of those who died in Mexico had an underlying medical condition such as obesity, diabetes (糖尿病)，high blood pressure and heart problems. That has led to a new urgency to change diets so that the younger generation doesn't suffer those illnesses.
The critics, however, say the leaders are using preexisting health conditions in COVID-19 patients to distract from a weak government response to the virus outbreak. Yet few people would deny that the country consumes large amounts of sugar-sweetened drinks and processed snacks with little nutrition --- or that Mexico has a major weight problem.
Oaxaca's governor approved the state's junk food prohibition last week. Legislators still have to complete the legal systems, and punishment could include fines and even jail. Lopez says legislators from all over the country have called her for advice. Many other states are debating a junk food ban. However, a nationwide law would not be easy. "There are powerful commercial interests that least want it to happen, but we must prioritize the well-being of our children," Lopez says.
1. What is Lopez 's attitude towards the junk food?| A．Negative. | B．Neutral. |
| C．Positive. | D．Indifferent. |
| A．Keep distance. | B．Avoid illnesses. |
| C．Break away. | D．Shift attention. |
| A．Selling children junk food has been banned nationwide in Mexico. |
| B．Most Mexicans who died of COVID-19 had other health problems. |
| C．The younger generation doesn't suffer any weight problems. |
| D．People who break the prohibition in Oaxaca will only be warned. |
| A．Teenagers. | B．Legislators. |
| C．Soft drink companies. | D．State governors. |
10 . The idea of biophilia — that humans love spending time in nature — has been around for generations. While it’s well-known that we get psychological benefits from nature, it’s not always clear which parts of nature provide those perks. Is a city park as good as an old-growth forest? What about less green natural settings like deserts?
Much of the focus of current findings has been on visual features of nature （like trees, flowers or beaches）, but a new study takes a slightly different approach. Set to unfold over the next three years, it intends to find out the effects of bird songs on human’s brains.
Lead researcher Eleanor Ratcliffe tells the Guardian: “Much anecdotal evidence suggests we respond positively to birdsong. However, now there’s a lack of scientific research on the psychological effects of listening to birds.”
With funding from the U. K. National Trust and the Surrey Wildlife Trust, Ratcliffe will begin by interviewing a representative sample of the public to judge their perception （感知） of natural sounds. She’ll try to find out if bird songs can improve mood and attention after stress or tiredness. Later in the study, she’ll seek test subjects via social media to assess the effects of bird songs on their brains and behavior. Beyond that, she hopes to learn more about which kind of bird songs improve mental health, and in what ways.
We’ll have to wait for answers, since the study is scheduled to take years. However, as National Trust ecologist Peter Brash argues, dedicated birders already know the benefits of bird songs. “Birdsong gives us a warm glow inside when we hear it,” he writes on the National Trust’s website. “We’re all used to the need to eat five fruits and vegetables a day or take a 30-minute walk. Taking the time out to listen to five minutes of birdsong every day could also be beneficial to our well being.”
1. What does the underlined word “perks” in the first paragraph mean?| A．Experiences. | B．Changes. | C．Results. | D．Benefits. |
| A．Their particular research areas. | B．The health effects of bird songs. |
| C．The great need for their new study. | D．The limitation of previous study. |
| A．It focuses on the effects of visual natural appearance. |
| B．It aims to discover how bird songs affect human brains. |
| C．It is a 3-year study mainly funded by the government. |
| D．It is going to be carried out mostly on the Internet. |
| A．To suggest. | B．To entertain. | C．To advertise. | D．To summarize. |
