1 . A new study has found that animals feign（假装）death for long periods of time in order to escape capture from their predators. How long they are motionless depends on the circumstances, but they can wait out their predators for quite a long time when their lives are in danger.
Animals stay still to avoid capture for different lengths of time. “Most intriguingly, Charles Darwin recorded a beetle that remained motionless for 23 minutes. Antlions, our favorite study creature in this regard, set a record of 61 minutes,” says lead author Nigel R. Franks from the University of Bristol.
Antlions are members of large group of insects. Antlion larvae（幼虫）dig pits in loose soil and then aggressively attack ants and other small insects that fall into the sandy pits. In another study, researchers dug sandpits to understand the physics of how antlion larvae build their pits. As part of their research they needed to weigh the individual larvae. When they put them onto the microbalance scale to weigh them, they noticed that the larvae remained motionless for long periods of time. “This made it ‘piece of cake’ to weigh them but it aroused researchers’ curiosity, ‘What on earth were they playing at?’” Franks says.
The researchers found that the amount of time the antlions remained stationary after being disturbed was unpredictable and was often quite lengthy. In researching other animals, they found that how long they wait to move again can depend on factors such as hunger and temperature, but it always varies.
This unpredictability is absolutely crucial for their survival, Franks says. For example, if a bird visits these antlion pits and the larvae “play dead”. the birds will fly around the antlions to see if they move. “Imagine if antlions always remained immobile for 5 minutes. In such case, the predator could look for alternate prey（猎物）and then return to its original one when the time is up,” he says. “If that happened, it would be a short life for the predictable death-feigner.” But because the time is unpredictable, the birds leave and go find something else to eat. The predators turn their attention from the unmoving prey that no longer catches their eye to something nearby that is a better alternative.
1. What is the new study about?| A．Animals’ hunting skills. |
| B．Animals’ living conditions. |
| C．Animals’ self-protecting behavior. |
| D．Animals’ means of communication. |
| A．To introduce a new topic for discussion. |
| B．To offer supporting data for the discovery. |
| C．To make a comparison between the two studies. |
| D．To provide some background information on the study. |
| A．Unmoving. | B．Alarmed. | C．Energetic. | D．Peaceful. |
| A．By scaring away predators. |
| B．By distracting predators’ attention. |
| C．By staying still for an uncertain amount of time. |
| D．By waiting for predators to eat something else |
2 . Research has shown that disrupting one's natural “morning lark” (早起鸟) or “night owl” (夜猫子) tendency can result in immoral behavior at work.
Who doesn't love a flexible work schedule? Being able to make your own hours, come in when you're ready and leave when you're done, step out to attend a child's presentation at school, have a midday appointment, or even squeeze in a quick workout or nap as a guaranteed pick-me-up — flexibility greatly improves one's quality of life.
The benefits don't stop there, however. Research has shown that having flexible work hours actually makes one a better person. How so? It's been found that disrupted sleep patterns —in the form of having to act outside of your normal inclination to be a morning “lark” or a night “owl” — can result in strange, unethical, and out-of-line behavior.
Science journalist Linda Geddes said, “If you don't get enough sleep, research suggests you are more likely to have unethical behavior, such as being mean, bullying your fellow employees or falsifying receipts. But it's not just owls: the larks tend to behave more unethically in the evening, and owls in the morning. So ideally, you want to introduce flexible working."
Employers would be wise to allow their employees to start whenever they feel ready — whether it's at the crack of dawn or at 11 a.m., and to allow breaks or pauses in the day as needed — because that would mean better productivity, performance, and behavior.
This shift is already happening, with the New York Times recently reporting that 27 percent of US employers now offer the flexibility to work outside normal business hours, up from 22 percent in 2014; and 68 percent allow telecommuting as needed (up from 54 percent in 2014). With the national unemployment rate at its lowest in 50 years, employers are having to become more competitive in what they offer workers, and flex-hours seem like a no-brainer, highly beneficial to all.
1. What is mainly talked about in Paragraph 2?| A．Ways to improve life quality. |
| B．People's activities in their free time. |
| C．Methods to get a flexible work schedule. |
| D．The advantages of flexibility in work time. |
| A．Judgment. | B．Tendency. | C．Reaction. | D．Choice. |
| A．They will show their nature more easily. |
| B．They tend to suffer from sleep problems. |
| C．They tend to behave immorally in their work. |
| D．They will get more flexibility in working time. |
| A．The unemployment rate is increasing. |
| B．Employers are getting more free time. |
| C．Flexible working has been creating more jobs. |
| D．More employers adopt a flexible work schedule. |
3 . Many adults rely on caffeine to get them through the day. But that’s the last thing kids need, according to the governments of England and South Korea.
England woke up to the news that the government is preparing to ban the sale of energy drinks like Red Bull to children.
The ban only applies to England, but Scotland, Wales and Northern Ireland can all follow suit if their administrations wish. In March, several major supermarket chains announced they would ban the sale of energy drinks to children under 16. Meanwhile, South Korea announced plans to ban the sale of coffee in schools by September 14.
The first reason for the ban is the high level of caffeine in the energy drinks, which has been linked to health problems for children, including head and stomach aches, as well as sleep problems.
A 250ml can of Red Bull contains about 80mg of caffeine, roughly the same as a similarly sized cup of coffee, but three times the level of CocaCola.Monster Energy, which is often sold in larger cans of 500ml, contains 160mg of caffeine.
Energy drinks often also have higher levels of sugar than soft drinks.Sugared energy drinks have 60% more calories and 65% more sugar than normal soft drinks and sugar is one of the largest causes of obesity.
British national official for education, Darren Northcott, described the drinks as “legal highs” that helped to fuel bad behavior in schools.
In addition to limiting kids’ access to caffeine and energy drinks, the South Korean government has also banned TV commercials for fast food, sugary snacks and highcaffeine beverages during times when most children’ s programs air.
South Koreans drink an average of 181 cups of coffee a year, by far the most in Asia.That is more than the 151 consumed per person in the UK but less than the average of 266 cups in the US.
1. Which part of the UK will be the first to ban the sale of energy drinks to children under 16?| A．England. |
| B．Scotland. |
| C．Wales. |
| D．Northern Ireland. |
| A．Paragraph 5 provides numbers for Paragraph 4. |
| B．They are parallel. |
| C．Paragraph 4 presents an argument. |
| D．Paragraph 4 provides reasons for Paragraph 5. |
| A．Reduce. | B．Settle. | C．Encourage. | D．Ignore. |
| A．Caffeine in Energy Drinks |
| B．Reasons for the Ban on the Sale of Energy Drinks |
| C．Coffee Sales in the UK and South Korea |
| D．England and South Korea Ban Caffeine for Kids |
4 . Gerardo Ixcoy is a 27-year-old teacher in Guatemala. He teaches in the area where having electricity is something of a luxury（奢侈品）and students have no access to mobile apps or computers, which became a problem when Guatemalan government had to choose distance education for students at home because of COVID-19.
Gerardo Ixcoy felt that he had to teach those children living far from the digital world. After all, education is a universal right and Gerardo Ixcoy thought those children shouldn't be excluded from having the education they needed. There had to be an alternative to distance education. But what was the solution?
Gerardo bought himself a secondhand tricycle（三轮车）with his savings. Once he had the tricycle, the next step was to change it into a classroom on wheels. He put a roof with a solar panel（太阳能电池板）on it, along with a screen to avoid the spread of COVID-19. He fixed a whiteboard on it so he could explain to the students the basics of primary education： math, the local language and the universal national language—Spanish.
The purpose of the solar panel is to provide constant power for a small loudspeaker so he can teach from a distance. It's a matter of respecting the healthy distance required to be safe from the virus. He, the teacher, stays outside, and the student participates from his or her house.
With that enthusiasm for education, he tries to visit his students at least twice a week, riding his classroom-cycle. The children he serves say that, although he visits them for only a few hours a week, they look forward to it. They appreciate his visit and will take advantage of it to learn.
1. What is the problem for the Guatemalan students because of COVID-19?| A．They cannot continue their study any more. |
| B．They are cut off from the digital world and the Internet. |
| C．They have no right to get the government's distance education. |
| D．They have to get distance education but they have no access to it. |
| A．Chosen | B．Prevented. |
| C．Protected. | D．Separated |
| A．He provided them with a whiteboard to write on |
| B．He fixed a solar panel on their house roofs to give electricity. |
| C．He rode his tricycle to their houses and taught them face to face. |
| D．He transformed his tricycle into a classroom on wheel to give them lessons. |
| A．Love for education breaks down barriers |
| B．Education contributes to success. |
| C．Great hope makes great man. |
| D．Hard work pays off. |
5 . A strong coffee after a poor night's sleep is the kick-start many people need in the morning but new research suggests that it might be best to have a bite to eat first.
A study has found that drinking coffee first can have a negative effect on blood sugar control - a risk factor for diabetes （糖尿病）and heart disease.
“We know that nearly half of us will wake in the morning and, before doing anything else, drink coffee --- subjectively the more tired we feel, the stronger the coffee,“ said Professor James Betts, at the University of Bath in the UK.
For their study, researchers at the University of Bath got 29 healthy men and women to take part in three different overnight experiments, with at least a week between them.
In one, the participants had a normal night's sleep, roughly from 11 p.m. to 7 a.m., and were asked to consume a sugary drink on waking in the morning. They then experienced an interrupted night's sleep, where the researchers woke them every hour for five minutes by sending them text messages to which they had to respond — and upon waking were given the same sugary drink.
On another night, participants experienced the same sleep interruption, but this time were first given a strong black coffee 30 minutes before consuming the sugary drink.
They found that one night of interrupted sleep did not worsen the participants' blood sugar and insulin （胰 岛素）responses when compared to the normal night's sleep-- although previous research suggested that losing many hours of sleep or many nights of poor sleep could have a negative effect. However, strong black coffee consumed before breakfast actually increased the blood sugar response by around 50% — suggesting that relying on coffee after a bad night to stop feeling sleepy could limit your body's ability to tolerate the sugar in your breakfast.
1. What does the underlined word “kick-start" in paragraph 1 refer to?| A．A kind of sport. | B．A kind of power. |
| C．A kind of medicine. | D．A kind of belief. |
| A．The duration of sleep. | B．The blood sugar response. |
| C．The sugary drink. | D．The intake of coffee. |
| A．A normal sugary drink. |
| B．A normal night's sleep. |
| C．An interrupted night's sleep. |
| D．A cup of strong black coffee. |
| A．By comparing the results. |
| B．By listing some examples. |
| C．By surveying the participants. |
| D．By referring to some documents. |
6 . We all know it is important for students to get a good night’s sleep every night. They aren’t able to do their best unless they sleep well. Most experts agree that the proper number of hours is eight, and this has been accepted as common sense for as long as I can remember. However, I was young once and I know that most of you get much less sleep than that-and sometimes this affects your schoolwork.
I read an article in a teachers’ magazine recently. They did a study of 848 students in a senior school. Worryingly, the results suggested that teenagers are facing a new problem. They may go to bed and get up at proper times but a growing number wake up in the middle of the night, not to use the bathroom or have a snack but because of FOMO-the fear of missing out!
According to the article, schoolchildren suffer because of an increasing trend to wake up during the night to check social media. Afraid of missing a message or chance to take part in a discussion, teens wake up at all times of the night to go online and join up with social groups. All this happens when they should be sound asleep.
The report gives some worrying numbers. 23% of 12-to 15-year-olds wake up nearly every night to use social media. Another 15% wake up at night once a week for the same reason. As a result, one in three students are constantly exhausted and unable to do well at school.
So, I’d like to ask you to be responsible when it comes to social media. Be brave and turn off your phones and computers at night. The world won’t end and your social media will be waiting to greet you in the morning. I give you my word that you won’t have missed anything important.
1. What is the new trend among teenagers?| A．They get up too early in the morning. |
| B．They wake up at midnight to go online. |
| C．They wake up at night to get something to eat. |
| D．They have difficulty in falling asleep again at night. |
| A．A fear of going online. |
| B．A need to go out all the time. |
| C．A fear of losing touch on social media. |
| D．A need to use the latest technology. |
| A．disappointed | B．surprised | C．confused | D．tired |
| A．Uninterested | B．Supportive | C．Concerned | D．Doubtful |
7 . Unlike doctors, nurses are at the forefront of care. They are there when you are admitted, when you rest and when you recover. They are the faces patients see when they are in pain, the ones they get to know and trust to take care of them.
Nursing is also an excellent option for those who want to work in healthcare but cannot go on to become a doctor. You can start with just a few weeks of education and work your way up. There are still educational requirements but many top nursing degrees are specifically designed to be completed while you work full-time.
If you want a career where your job is to actually help people heal, rather than deal with emergencies as they come, then nursing is for you.
Today alone, there are an estimated 800, 000 unfilled nursing jobs in the country, and a further 1 million shortage expected by 2030 when existing nurses start to retire. Job hunting is typically a nightmare for those fresh out of college, but in nursing, you are almost guaranteed a position in nearly every setting.
There are also new rules in place that mean you can work as a nurse in a variety of states without retaking the exams. There are still steps you will need to take if you move from one qualifying state to another, but this freedom means you can find your true home and continue to work as a nurse with very little interruptions. Travel if you want as a nurse; live in your dream home outside of the city as a nurse.
The world needs more nurses, because nurses make a direct impact on recovery. It is reported that one more nurse can save 9 extra people out of every 1,000 patients, that is to say your work matters.
1. What can we infer according to the first paragraph?| A．Healthcares would be complete without nurses. |
| B．Patients and nurses have a good relationship. |
| C．Patients like nurses much more than doctors. |
| D．Healthcares need more nurses than expected. |
| A．Challenge. | B．Step. | C．Choice. | D．Way. |
| A．800,000 nurses will be badly needed. |
| B．1 million nurses will dislike their jobs. |
| C．The USA will see a high rate of unemployment. |
| D．There will be a great demand for nurses. |
| A．You needn’t take extra exams when working in other states. |
| B．You have much freedom as to what you’d like to do. |
| C．You can travel around the world without working. |
| D．You have a chance to travel without interruptions. |
8 . Now, chemists have discovered new potential in abundant building blocks: Through a series of reactions, scientists have shown that conventional bricks can be transformed into energy storage devices powerful enough to turn on LED lights. “What we have demonstrated in our paper is sufficient enough for you to light up emergency lighting that's in a hallway or sensors that could be put inside the walls of a house, "said Julio M. D’ Arcy, an assistant professor of chemistry at Washington University in St. Louis, Missouri, and one of the study's authors. "The next step is trying to store more energy, so that you can power bigger devices--like maybe a laptop--directly from the walls of the house. ”
“Bricks have been prized by architects for their capacity to store heat, but using them to hold electricity has never been tried before, "D'Arcy said. To allow the bricks to store electricity, the researchers pumped a series of gases inside the brick. "The gases react with the brick's chemical components, coating them with a web of plastic nanofiber (纳米纤维）known as a PEDOT, which is a good conductor of electricity, "he said. Though PEDOT can store large amounts of energy, this supercapacitor (超级电容器）cannot hold onto that charge or deliver sustained energy over long periods of time like batteries can. “A battery will give you energy density that will allow you to drive 300 miles, but a supercapacitor will allow you to accelerate very quickly at a red light,” D’ Arcy said.
Still, scientists see potential in the bricks as a possible green energy solution. Right now, these "smart bricks" cannot compete with the energy storage potential of the lithium-ion (锂离子）batteries used in many solar power systems. However, there is hope that this new technology could be developed to provide a new storage method using readily available materials.
“The performance is a long way short of custom-made supercapacitors, but the principle is proven and there is significant room for improving the storage characteristics by optimizing the structure and chemistry of the bricks,” said Dan Brett, a professor of electrochemical engineering at University College London, who was not involved in the study.
1. What will the scientists do about the bricks next according to M. D'Arcy?| A．Put the bricks into commercial use. |
| B．Refer their paper to academic journals. |
| C．Expand the bricks' ability of storing power. |
| D．Develop new smart laptop with powered bricks. |
| A．It allows bricks to take up less space. |
| B．It can protect bricks with a powered coat. |
| C．It helps bricks store and conduct electricity. |
| D．It can make the powered vehicles travel farther. |
| A．They need much more development. |
| B．They are more environmentally-friendly. |
| C．They will be released into the market soon. |
| D．They can be made according to consumers' requirements. |
| A．Making the most of. | B．Trying out for. |
| C．Breaking up with. | D．Breaking away from. |
9 . Brooke wanted a dollhouse and some sugar cookies. So the 6-year-old asked Alexa to get them. Alexa wasn't her mom or babysitter. It was a voice-activated home assistant powered by artificial intelligence(AI). Alexa comes with the Amazon Echo device. And it made Brooke's wishes come true. After being reported on' TV, Alexa devices in many listeners' homes woke up and tried to order dollhouses!
Alexa isn't the only Al willing to order up treats for you. Apple Homepod has Siri, Google Home has its Assistant, and the upcoming Galaxy Home device will have Bixby. People who own these devices use them mainly for listening to music, checking the weather, and setting timers. According to a report from The Information, people don't often do voice shopping. They do it mainly to order simple things like paper towels. But many experts predict a boom in voice shopping in the near future.
Convenience is the main benefit of voice shopping. You can shout out an order as soon as you think of it, even if you're cooking or driving. Besides, people who are unable to use a keyboard or mouse can shop without assistance.
But voice shopping has its downsides. Unwanted things aren't the biggest problem. It's usually very easy to cancel an order or return items. The surprising thing is that these assistants are always listening. They have to be able to respond when you want them. So they listen for "Alexa" or "OK Google" or another command. When they hear it, they start recording the conversation. Some have worried about what happens to these recordings. Should companies be allowed to use them to learn about people's shopping habits? What if someone hacks the device? What if someone hacks smart TVs to turn them into spies that listen all the time?
1. What is Alexa?| A．A TV reporter. | B．A friend of Brooke. |
| C．A voice-activated device. | D．A cookie maker. |
| A．Alexa is the best Al device |
| B．People buy various things through voice shopping. |
| C．People use Bixby mainly for listening to music. |
| D．Voice shopping may have a bright future. |
| A．Optimistic | B．Doubtful | C．Objective. | D．Negative. |
| A．Repairs. | B．Attacks | C．Hides. | D．Sells. |
10 . Many of us work hard to achieve a successful career. We spend years in school, and then get a well-paid job that we think will bring us a comfortable life. Then one day we realize that all we seem to do is work and have forgotten how to relax.There's nothing wrong with being ambitious.The problem is that we don't keep a good work-life balance.
Here are some simple activities that can help you find more peace and balance in your life.
Take a warm bath
A warm bath will help you relax physically and mentally. The warm water will relax your muscles and in addition, the environment will help calm your mind and improve your mood.
Go outside
The fresh air and change of scenery can help you clear your mind. In addition, seeing the rest of the world helps you put things into a larger perspective.It helps you see things beyond your own busy lives.
Try meditation
Meditation is a powerful tool to help you relax. Basically, all you have to do is sit quietly for a few minutes and follow your breath. You don't have to do it perfectly,and you don't have to meditate for long periods to get the benefits.
If you want more balance in your life, then make relaxation a part of your daily life. Not only will you feel better, but also you will be more productive and gain more satisfaction from your work and your personal life.
1. What is this article about?| A．What a comfortable life is like. |
| B．The best ways to enjoy yourself. |
| C．Activities that you should do for your success. |
| D．How to live a peaceful and balanced life. |
| A．People should be relaxed instead of working hard. |
| B．Taking a warm bath is less useful for sportsmen. |
| C．Going outside can broaden your mind and horizon. |
| D．The more relaxation you have, the better you will work. |
| A．think | B．sleep | C．exercise | D．breathe |
