1 . I did an experiment last week. No, nothing involving test tubes or beakers (烧杯). Instead, I experimented with not watching the news right before I went to bed.
This is a long-time habit of mine so it’s probably not surprising that the first couple of nights I got a little twitchy when news time rolled around and I wasn’t watching. To distract myself, I went to bed a little earlier and read. Wow, what a treat that was! I love to read but I don’t always make the time for it so this felt quite luxurious. On the nights I didn’t read, I spent a little extra time petting my dog, Henry. He loved it. There’s never enough ear scratching for him. The compromise nights were when I had a book in one hand and was petting the dog with the other. Happy all around!
The funny thing about happiness is that it’s a whole lot easier to feel when you’re not being bombarded (轰炸) by images of bad news. It’s not like skipping the late news means that I don’t know what’s going on in the world. I still do read, listen to, and watch news stories. Just not right before I go to bed. That makes it easier to fall asleep and then stay asleep without dreaming about crime, wars, or natural disasters. (Although that dream I had about going to the prom might count as a natural disaster!) It’s definitely a much gentler way to end the day. I like it so much that I’m going to not only continue the no news before bed practice, but I’m also going to experiment with turning off other electronics earlier in the evening, things like the computer and smart phone.
Do you have any experience with turning off your electronics early in the evening? Does setting a particular time, like digital Quiet Hours, work? Please share any tips you have. Something tells me that this could be a little more challenging for me than no news.
1. What does the underlined word “twitchy” mean?| A．Angry. | B．Sad. | C．Anxious. | D．Pleased. |
| A．To treat himself with snacks. |
| B．To read to his dog. |
| C．To turn off the TV. |
| D．To read in bed. |
| A．He had more time to walk his dog. |
| B．He was less exposed to images of bad news. |
| C．He was cut off from the current world. |
| D．He had nightmares. |
| A．To encourage the readers to cut down time on electronics. |
| B．To gather the readers’advice in watching TV. |
| C．To share the effect of watching news. |
| D．To tell the readers the importance of reading. |
2 . What happens when you cross stem cells from a frog heart and frog skin? Not much-that is, until you program those cells to move. In that case, you've created a xenobot, a new type of organism that's part robot, part living thing.
Now a team of scientists has used living cells from frog embryos and assembled them into entirely new life-forms. These millimeter-wide xenobots can move toward a specific target and pull themselves through after being cut.
These are novel living machines," says Joshua Bongarch a computer scientist and robotics expert at the University of Vermont who co-led the new research. "They're neither a traditional robot nor a known species of animal. It's a new living, programmable organism.
Xenobots borrow their name from Xenopus laevis, the name for the African clawed frog from which the researchers harvested the stem cells. They combined together well two different kinds of cells-heart and skin cells. The heart cells are competent in expanding and contracting, which aids the xenobot in locomotion, and the skin cells administer structure. Besides, they can't accomplish tasks without the help of computers.
By studying these curious organisms, researchers hope to learn more about the mysterious world of cellular communication. Plus, these kinds of robo-organisms could possibly be the key to drug transmission in the body or greener environmental clean-up techniques.
“Most technologies are made from steel, concrete, chemicals, and plastics, which degrade(降解)over time and can generate harmful ecological and health side effects the authors note in a research paper. "When these xenobots finally do stop working, they fall apart harmlessly.
“Promising as these organisms are, when we start to mess around with complex systems that we don't understand, we're going to get unintended consequences Michael Levin, a biophysicist and co-author of the study, says in a press statement.
1. What do we know about the xenobot?| A．It is not easy to degrade over time. |
| B．It can recover itself after being cut. |
| C．It will never die with a computer inside. |
| D．It is named after a kind of American frog. |
| A．Appearance. | B．Position. |
| C．Application. | D．Movement. |
| A．recycle waste in nature. |
| B．replace certain damaged organs. |
| C．deliver medicine inside patients. |
| D．improve communication technology. |
| A．Xenobots can be put into the market soon. |
| B．Xenobots are created totally by accident. |
| C．More research should be done on xenobots. |
| D．It is hard for people to understand xenobots. |
3 . Many college students turn to ADHD（注意缺陷障碍）medicine during the exam week, which is regarded as “smart drugs” that will help their academic（学术的）performance. The thinking is that if the drugs help students with ADHD improve their focus, they should provide the same benefit for people who don’t have the disorder.
But a new study shows that drugs can actually damage brain function of healthy students who take the drug hoping to boost their intelligence. “It’s not a smart drug which will suddenly improve their ability to understand information they read,” said Lisa Weyandt, a professor at the University of Rhode Island.
To test whether this effect is real or not, researchers organized 13 students to take part in two five-hour study sessions（一段时间）in the lab. The students took the standard 30mg ADHD drugs before one session, and a sugar pill before the other. Students on ADHD drugs did experience an increase in their blood pressure and heart rates. “The medicine was having an effect on their brain,” Weyandt said. The students also showed an improvement in their ability to focus, the researchers found.
However, students on ADHD drugs experienced no improvement in reading comprehension, reading fluency or knowledge reviews, compared to when they’d taken a sugar pill. “We read aloud stories to them and asked them to recall information from the stories, ”she said. “That didn’t improve.”
Worse, the ADHD drug actually harms students’ memory. It’s often misused because people pull all-nighters and they’re tired, and they think it’s going to keep them awake. Maybe it does, but it’s certainly not going to help their academic work. The brain is still developing until the mid to late 20s. It’s important to keep it healthy. There’s also a chance that ADHD drugs could endanger a student’s heart health.
1. Why do some college students take ADHD drugs?| A．To improve their sleeping. | B．To get higher marks. |
| C．To make them feel relaxed. | D．To treat brain disorder. |
| A．Analyze. | B．Affect. |
| C．Improve. | D．Understand. |
| A．They became more focused. |
| B．Their blood pressure was reduced. |
| C．Their reading fluency was greatly raised. |
| D．They could remember better and more quickly. |
| A．In a drug instruction. | B．In a biology textbook. |
| C．In a travel magazine. | D．In a news report. |
4 . There is more that comes with older age than greying hair and wrinkled skin When humans reach their later years, they favour more established friends and their social circle is reduced.
Now, for what appears to be the first time, scientists have seen the same behaviour in another species. Twenty years of observations of chimpanzees (猩猩) reveal that older males choose to hang out with their long-term friends at the expense of other relationships.
The researchers studied 78, 000 hours of observations made between 1996 and 2016 that followed the social interactions of 21 male chimpanzees between the ages of 15 and 58 years old. They classified the chimps’ relationships depending on the amount of time they sat with others and groomed (梳毛) them. They then rated the various pairings as mutual (相互的) friendships, where both chimps seemed to enjoy the relationship; one-sided friendships, where one chimp was more keen to be friends than the other; and non-friendships, where neither chimp showed interest in the other.
When the scientists looked at the patterns of friendships, they found that the older chimps had more mutual friendships and fewer one-sided friendships than younger chimps. Another feature seen in older humans was also spotted in the chimps. As the males got older, their levels of aggression (挑衅) tailed off, meaning they started fewer fights and tended to intimidate others in their group less often.
The observations have left the researchers puzzled. According to an idea in psychology known as socioemotional selectivity theory, or SST, older humans prefer more positive relationships because they are aware time is running out. But many animal experts argue that chimpanzees lack the human sense of mortality (死亡), suggesting something else is driving the behaviour.
Robin Dunbar, a professor of evolutionary psychology at the University of Oxford, said in humans, the decline in social circles with age is due to declining social motivation to get out and meet people combined by lack of opportunity. In chimpanzees, as older males compete less for mates, they may focus on close, reciprocal (互惠的) relationships with trusted partners, she said.
1. What do older male chimpanzees favour?| A．Old friendships. | B．New bonds. |
| C．Greying hair. | D．Wrinkled skin. |
| A．By turning to other scientists. |
| B．By introducing a new concept. |
| C．By forming relationships with them. |
| D．By analyzing two decades’ observations. |
| A．Threaten. | B．Motivate. | C．Defend. | D．Accompany. |
| A．Awareness of time. | B．Less competition for mates. |
| C．Low motivation for socialization. | D．Lack of the human sense of mortality. |
5 . That morning, I dropped our eldest at kindergarten and returned home to let our two younger children play while I worked on my medical report. It was a wonderful chance to work from home, but it hit me that my career in hospital wasn't making a difference in anyone's life. I needed something that would stretch my limits and push me to grow. My career enabled me to work from home. I could work from home, and become a foster mother, providing safety for a child who needed it desperately.
On Monday morning. I picked up the phone and dialed the number I had Googled for the nearest Department of Children's Services. The man on the other end was receptive to my questions and explained the next step of training, involving eight weeks of classes designed to prepare and educate foster parents. We continued through all the classes, the home visits, background checks, and seemingly endless steps.
Five long months after we were approved, the phone rang. In the middle of the night, I woke my husband and rushed to East Tennessee Children's Hospital. Our placement was waiting for us in the emergency room, sick and lack of nutrition. It didn't take long for us to realize the full depth of her suffering. Six months later, her half-brother came to us by our request. We now had five children under our care.
On August 12, 2016, our family of seven walked into a small courtroom. The children's lawyer and social worker were there. With just a few words, our adoption was finalized. These two amazing children weren't going home, because they were already home. We are their forever family, and they are our forever children. We may not be able to change the entire world, but we have changed the world entirely for our new children.
1. How did the author feel about her hospital work?| A．Lacking of motivation. | B．Filled with challenge. |
| C．Highly motivating. | D．Unusually Demanding. |
| A．She felt sympathetic for abused children she knew. |
| B．She wanted to make a difference in other people. |
| C．She felt confident about her ability to raise children. |
| D．She experienced training to raise children properly. |
| A．The child to be adopted. | B．The need to get trained. |
| C．The approval of adoption. | D．The official at the hospital. |
| A．To put the adopted kids elsewhere. | B．To receive another adopted child. |
| C．To make the adoption officially legal. | D．To begin the kids' adoption in her home. |
6 . As online technology advanced, web sites, podcasts, and blogs became powerful sources of information that allowed everyone to stay updated on any subject imaginable. Although all of these information sources remain popular, there's a new king of media and it's online video.
There are many reasons why online video has increased suddenly over the past few years. The first is increasing data speeds. It wasn't until recently that people everywhere had fast enough online connections to enjoy high-definition （高清）videos. However, once faster Internet speeds were provided, people quickly fell in love with online videos. The second reason why online videos have become so popular is convenience. Watching videos requires less effort and energy than reading through paragraphs of text after a day of hard work. Videos also seem to provide more satisfaction, as people prefer to connect with people they can hear and see, as against the words of some author whom they know little about.
Advancing digital technology has also helped, as it has made sharing videos easier and more convenient than ever. High-powered smartphones and more affordable video cameras allow anyone to easily record an event or give a few comments about a scorching topic that is on their mind. Meanwhile, sites like YouTube, Vimeo, and Ustream allow users to quickly upload their videos and share them with friends, family, and the general public if they wish.
Last but not least, advertising. Companies have made it easy for people to get rewarded for creating popular videos. Some people with large enough fan bases can even make a very wealthy living by uploading a few videos every week.
The future also looks bright for companies who post online video ads. In fact, new software allows them to watch viewers' emotional reactions to their content through the users' webcams （网络摄像机）.They'll be able to see whether users laugh, cry, or feel bored during videos, so they can adjust their ads. This should prove extremely helpful, as there will be millions of videos competing for viewers' attention.
1. Why do some people prefer watching videos to reading after work?| A．It helps them review the news. |
| B．It helps them get information with relative ease. |
| C．It provides them more information. |
| D．It helps them save time. |
| A．Unusual. | B．Future. | C．Hot. | D．Social. |
| A．It will enable them to better understand what customers enjoy. |
| B．It will let more viewers see the advertisements they make. |
| C．It will cause viewers to create more popular videos. |
| D．It will make people like their videos. |
| A．Online Video: The New King of Media |
| B．Online Technology is Developing Fast |
| C．Online Video: A New Advertising Trend |
| D．Online Technology is Closely Related to People |
7 . British beer and pubs are famous around the world. Things are changing, however. Is this the end of a great British tradition?
For thousands of years, a very important building in any British village has been the pub. In fact, until a place has a pub, it is not really considered a community worthy of a name. Traditionally, the pub is at the heart of any village or town, since it is where people gather to socialize and exchange news. It is an institution at the heart of British society. After all, the word “pub” is actually short for “public house”.
As a result, British pubs are often old and well preserved. Many of them have become historic sites that tourists visit. Many British pubs have names referring to monarchs, such as The King's Head or The Queen Victoria, but of course this doesn't mean they are only for kings and queens. Pubs have always welcomed people from all classes and parts of society. On a cold night, the pub boss can always find a warm place for customers by the fire. There is always honest and hearty food and plenty of drink available at an affordable price.
That's how it used to be, but there are worrying signs that things are beginning to change. Economic downturns, governmental austerity measures and cultural changes are causing many pubs to go out of business. People do not have a lot of spare money to spend on beer. On top of that, in 2007 smoking was banned in all public indoor spaces, including pubs, which may also have affected the number of customers going to pubs since then. This decline is happening despite the fact that pubs are now allowed by law to stay open after 11p.m..
In order to save their businesses, pubs are trying to diversify to attract new customers. And with various “save the pub” campaigns, there are signs that people are gathering around pubs to support this great British institution with pride.
1. Why are British pubs often old?| A．Because the British want to attract tourists. |
| B．Because the birth of a community often results from a pub in it. |
| C．Because they are where people socialize and exchange news. |
| D．Because they follow in the tradition of British kings and queens. |
| A．Emperors. | B．Bosses. | C．Special tourists. | D．Ordinary people. |
| A．Cultural differences. | B．Economic decline. |
| C．Changes in opening hours. | D．Regulations against drinking. |
| A．Conservative. | B．Skeptical. | C．Hopeless. | D．Objective. |
8 . There's plenty of video evidence on social media about some urban wildlife during pandemic lockdown（疫情封锁）.And while it's been for tragic, costly reasons, we have to stop the human activity all over the world for a while.
On an increasingly crowded planet, wildlife scientists think that this will have some important effects.The only way to measure that, though, is with lots of bio-loggers.
Professor Christian Rutz, University of St Andrews said that a bio-logger is a small electronic device that can record, store and in some cases automatically send information, so that information could be positional information, from which we can find out through satellite（卫星） tracking where an animal goes and what it's up to.
Through using the labor-saving equipment, researchers can get much information.For example, the information about more than 1500 birds' movements and migrations （迁徙）was recorded by those bio-loggers over a decade effortlessly.
However, studying human absence is more tricky."One famous study in the Chernobyl exclusion zone that I visited with scientists last year, has shown how nature took over a landscape that was abandoned after the nuclear disaster." Professor Christian Rutz said.
Now, in dozens of ongoing studies, wildlife researchers have their bio-loggers on animals from African elephants to migrating birds, and some of that data has been automatically uploaded throughout lockdown.Scientists do the research by focusing on the behaviour of animals without the presence of human.
Professor Christian Rutz told BBC： "And so this is really a golden opportunity to research this relationship between humans and wildlife and we hope that this project will inspire us to make plans for the future and there are some very useful suggestions that could come out of this.”
This lockdown has been at huge human and economic cost, which is why scientists say it's important to maximize what we can learn from lockdown, about how to share the space we have with many other animals.
1. Which is not the function of bio-loggers?| A．storing information of animals |
| B．recording information of animals |
| C．tracking the position of animals |
| D．sharing information of animals on the public media |
| A．unique. | B．difficult. | C．shallow. | D．common. |
| A．To research how bio-logger is used on animals. |
| B．To prove that animals can not live without humans. |
| C．To research how the absence of human affects animals. |
| D．To prove that bio-logger is effective to send the information. |
| A．Protecting wildlife is a wise choice. |
| B．Wildlife might benefit from lockdown. |
| C．Bio-loggers are widely used during the lockdown. |
| D．It doesn't matter whether we stop human activity or not. |
9 . Recently, as I watched my son Nathan play basketball for his school team, I was feeling sorry for myself and for him. His team was facing adversity (困境) on the court and he was playing in a hostile environment — it was the opponent’s home gym filled with their supporters, and Nathan’s team was trailing (落后) for three quarters of the game. As for me, I had just been dismissed (解雇) from my job earlier in that day.
During the drive home, I kept telling myself that I would find work again in a short time — I was always confident in my experience and abilities, but self-doubt was still sticking its foot in the door.
The basketball game entered the fourth quarter with Nathan’s team still trailing. I saw the determination on his face as well as his teammates’ as they fought back to not only tie the game, but then go ahead by three points. Then, a player from the other team made an unbelievable shot to make the game tied again. With the tied scores and seconds on the clock, Nathan found himself with the ball and with skill and confidence, he made the basket with a defender hanging all over him. The other player was called for a foul (犯规).
As Nathan stood preparing for a shot that would put his team up by three points, I saw the focus and determination on his face, with no room for self-doubt. Nathan was able to tune out all the distractions and nail the free throw with such skill, as if he had done it a thousand times.
As I sat there, my heart bursting with pride, it dawned on me that I had taught him perseverance (毅力) in the face of adversity, and he had just taught me the same lesson. That brief moment of self-doubt and feeling sorry for myself was blown away by the actions of my son on the basketball court. He will play in the finals, but it doesn’t matter if he wins or loses. At this moment, we both won.
1. What did the author estimate his son’s team would be like at first?| A．The team would finally win. |
| B．The team would lose at away court. |
| C．The team would lose at home court. |
| D．The team would tie with the opponents. |
| A．Avoid. | B．Focus. | C．Create. | D．Receive. |
| A．My son would win in the finals and I would find a job soon. |
| B．I had once taught my son face to face that we should never give up. |
| C．It was my encouragement and help that made my son win the game. |
| D．I would become more confident about my future after this experience. |
| A．Life Goes Just Like Playing Basketball |
| B．It Matters Whether to Win or Lose |
| C．A Lesson in Life and Basketball |
| D．A Moment of Self-doubt |
10 . When we were very small, we realized that having friends was important.Some of us even had imaginary (想象中的) friends.The need for friends continued as we grew into our teens.Friends played a big part in forming our personalities.As adults, it is still important for us to have friends.
True friends are people who like us though we made mistakes and who listen to us and tell us the truth.Friends support our decisions and tell us when we're foolish.They laugh with us and share our sadness.They are our partners and share interests with us.They stimulate us when we are feeling down.They are people we aren't afraid of telling our secret wishes to or what is really on our minds.
Friends are our supporters.When you can depend on friends, you feel safe and warm.Friends offer acceptance and emotional (情感的) support.At times, they also help with our everyday lives, cooking a meal, doing chores, or giving us a lift when we need one.Friends also are there to offer advice，an ear to listen, or a shoulder to cry on.
Friends also help us reduce stress.Not only do they listen to us when we feel stressed, but they also discuss what is stressing us.Sharing interests and doing activities with friends help us forget about problems at work or at home.For a short time, we can lose ourselves in a pleasant activity and perhaps laugh and breathe more easily.
1. What is the best title for the passage?| A．How to Reduce Stress |
| B．How to Make New Friends |
| C．The Importance of Friends |
| D．The Qualities of Good Friends |
| A．educate | B．encourage |
| C．surprise | D．dislike |
| A．people should make friends anytime |
| B．friends are people who allow you to cry |
| C．a friend helps you in many ways |
| D．good friends are always difficult to meet |
