1 . If a pancake could dream, it might long for legs so it could jump off your breakfast plate in pursuit of a better, unchewed life. But legs aren’t necessary for something as flat as a pancake to jump around. A group of scientists have designed a pancake-shaped robot that can jump several times per second and higher than seven times its body height. The new robot named Hop, which swiftly jumps without feet, is an important contribution to the soft robotics.
Many ground robots move by rolling or walking. But it’s more efficient for robots to jump over obstacles (障碍物) than to go around them. Although jumping can offer some robots a competitive edge, engineering that ability has been a challenge for robotics researchers. Some soft robots that store energy can perform a single impressive jump very infrequently. Some lightweight soft robots that don’t store energy can jump frequently but can’t jump high or far enough to successfully cross an obstacle.
For inspiration, the researchers looked to gall midge larvae (瘿蚊幼虫) that miraculously throw themselves across distances 30 times as long as their loglike bodies. A gall midge larva bends its body and squeezes the liquid in its body to one end, making it rigid (僵硬的). The accumulation of liquid builds up pressure, and releasing the pressure sends it soaring (飙升). The robot’s body doesn’t resemble (像) that of a gall midge larva, but it jumps like one. Its body is made of two small plastic bags printed with electrodes; the front bag is filled with liquid and the back one is filled with the same volume of air. The robot uses electricity to drive the flow of liquid, which causes the body to bend and generate force with the ground, resulting in a jump. And the air bag imitates the function of an animal’s tail, helping the robot keep a stable position.
While the robot is currently restricted to Earth, it might be right at home exploring another planet. If this is true, the researchers robot might jump over dusty rocks and large holes on the moon or Mars, going where no pancake has gone before.
1. What does the author want to show by mentioning a pancake?| A．A pancake’s dream to have legs is unrealistic. |
| B．A robot is capable of serving a good pancake. |
| C．A pancake-shaped robot can jump without legs. |
| D．Research on pancakes advances our understanding of robots. |
| A．Hop’s avoiding an obstacle. | B．Hop’s moving around by rolling. |
| C．Hop’s performing one remarkable jump. | D．Hop’s jumping high and far continuously. |
| A．They are shaped like logs. |
| B．They have tails to change positions. |
| C．They bend their bodies and increase force. |
| D．They are filled with liquid and have rigid bodies. |
| A．Intolerant. | B．Positive. | C．Indifferent. | D．Ambiguous. |
2 . Twelve-year-old Catherine has a lot of friends—632, actually, if you count up her online friends. And she spends a lot of time with them.
But is it possible that Catherine’s online friendships could be making her lonely? That’s what some experts believe. Connecting online is a great way to stay in touch, they say. However, some experts worry that many kids are so busy connecting online that they might be missing out on true friendships.
Could this be true? During your parents’ childhoods, connecting with friends usually meant spending time with them in the flesh. Kids played Scrabble around a table, not words with friends on their phones. When friends missed each other, they picked up the telephone. Friends might even write letters to each other.
Today, most communication takes place online. A typical teen sends 2,000 texts a month and spends more than 44 hours per week in front of a screen. Much of this time is spent on social media platform.
In fact, in many ways, online communication can make friendships stronger. “There’s definitely a positive influence. Kids can stay in constant contact, which means they can share more of their feelings with each other,” says Katie Davis, co-author of The App Generation.
Other experts, however, warn that too much online communication can get in the way of forming deep friendships. “If we are constantly checking in with our virtual world, we will have little time for our real-world friendships,” says Larry Rosen, a professor at California State University. Rosen also worries that today’s kids might mistake the “friends” on the social media for true friends in life. However, in tough times, you don’t need anyone to like your picture or share your blogs. You need someone who will keep your secrets and hold your hand. You would like to talk face to face.
1. What is the purpose of the first paragraph?| A．To tell about true friends. | B．To start a discussion. |
| C．To encourage online friendships. | D．To summarize(总结) the text. |
| A．In any case. | B．In public. | C．In person. | D．In advance. |
| A．Unconcerned. | B．Positive. | C．Worried. | D．Confused. |
| A．Teenagers need to focus on real-world friendships. | B．It’s easier to develop friendships in real life. |
| C．It’s wise to turn to friends online. | D．Social media help people stay closely connected. |
3 . How to Avoid an Internet Addiction
It may seem like everyone surfs the web these days. But if you can’t have interest in other aspects of your life because of the Internet, you may be on your way to an Internet addiction. You might fear you’re the only one who has experienced that feeling.
More and more people in the world are becoming addicted to the Internet, and you are not the only one with this problem. So do not be embarrassed. Just be brave to admit that you are on your way to an Internet addiction. And then find others with the same problem and help each other beat it.
Set aside limited time for computer use.
Make sure not to turn it on too many times a week. If you have a laptop, make sure to put it somewhere that you can remember but not somewhere that you see every day. Try keeping the lid closed when you are not using it.
Call people instead of sending instant messages or texts.
If you are free on weekends, call friends and ask them to go outside to do something you enjoy, like playing a sport. This will take your mind off the computer.
Use an alarm clock or timer (计时器).
Before using your computer, decide on a time limit such as 30 minutes. Set the clock or timer and make sure that you get away from the computer when the time is up. Alternatively create a shutdown timer on your desktop.
| A．Being addicted to it is quite normal. |
| B．Admit you are at risk of an addiction. |
| C．The truth, though, is that it’s quite common to be an addict. |
| D．When the computer is not looking at you, you are less likely to use it. |
| E．This can be programmed to shut down your computer after the set time. |
| F．If you have a problem on weekdays, phone your friends or ask for help in person. |
| G．This will prevent you from using the Internet so often or going on to another page. |
4 . Everyone “talks” with their hands at least sometimes. Some people’s hand-talking, or gesturing (手势) matches their messages well. Other people like to make gestures that can be confusing. And still others don’t use their hands much at all. No matter which group you are in, it’s important to pay attention to your hand gestures while you are communicating. And also remember hand gestures can have cultural meanings.
A few years ago, I was a speaker at a conference in Lisbon, Portugal. It was my first time in Portugal, and I became immediately fond of the special pastries (糕点) that Lisbon and Portugal are known for. One morning I went into a bakery and ordered two of the pastries. I did so by holding up two fingers, similar to the “victory” or “peace” gesture in the United States. The person behind the counter put three pastries in the box. I later learned that the gesture for two would raise thumb and index finger. Even though my thumb wasn’t showing, the person behind the counter thought I was signaling for three.
I was lucky that I didn’t get into more trouble than an extra pastry. Many hand gestures are not universal. Before speaking in a country that you are not familiar with, do some research to find out which gestures might be misunderstood, not understood at all or rude.
1. Why did the author go to Lisbon, Portugal?| A．To taste pastries. | B．To take a holiday. |
| C．To attend a meeting. | D．To learn Portuguese culture. |
| A．Normal. | B．Independent. | C．Common. | D．Complex. |
| A．One should be careful when ordering food in Portugal. |
| B．Hand gestures may have different meanings in different cultures. |
| C．The person behind the counter understood the author’s gesture. |
| D．The person behind the counter cheated the author. |
| A．tell us that hand gestures are not the same worldwide |
| B．explain the general use of gestures |
| C．ask us to use correct hand gestures in Portugal |
| D．share a funny story in Portugal |
5 . In the old-fashioned town of Willowbrook, two friends named Emma and Liam shared an intimate bond. They were inseparable and spent every moment together, laughing, exploring, and creating unforgettable memories.
One cold winter morning, as the first snowflakes gently fell from the sky, Emma woke up with a stuffy nose and a sore throat. She tried to brave it and get ready for school, but her body felt weak and achy. Unwillingly, she called Liam to let him know she couldn’t make it to school that day.
Liam was concerned when he heard the tiredness in Emma’s voice. “Don’t worry, Em. I’ll take care of everything at school for you,” he assured her. Feeling grateful for Liam’s understanding, Emma forced a smile and replied, “Thank you, Liam. You’re the best friend anyone could ask for.”
After school, Liam hurried to Emma’s house, carrying a meal he had prepared for her. He knocked on the door, and Emma’s mother welcomed him with a warm smile. “Oh, Liam, you’re such a thoughtful friend,” she said.
“I brought some soup and tea for Emma. I hope it will make her feel better,” Liam replied, some concern in his eyes. Entering Emma’s room, Liam found her curled up under a blanket, looking pale but relieved to see him. “Hey, I brought some comfort food to cheer you up,” he said, setting the food on her bedside table.
Emma’s eyes lit up, and she smiled weakly. “You didn’t have to, but thank you. This means the world to me,” she whispered. Sitting by her side, Liam kept her company, chatting softly and making her laugh despite her illness. The warmth of their friendship enveloped the room, bringing a feeling of comfort to Emma’s tired soul.
As Emma regained her strength, she realized just how lucky she was to have a friend like Liam. His unwavering presence and kindness had made her recovery easier and brighter. Their friendship grew stronger with each passing day, and from that moment on, they knew they would be there for each other through thick and thin.
1. What does the underlined word “intimate” in Paragraph 1 probably mean?| A．Satisfactory. | B．Informal. | C．Close. | D．Temporary. |
| A．It was too cold to go outside. | B．Liam failed to pick her up. |
| C．She was in a bad condition. | D．School was closed for the heavy snow. |
| A．Considerate and caring. | B．Brave but lazy. |
| C．Selfless and active. | D．Independent but stubborn. |
| A．Emma’s illness. | B．A precious friendship. |
| C．Liam’s company. | D．How to help a friend. |
6 . The first week of September was a week that I had been expecting (期待) all summer. I didn’t want summer to end, but I was excited about going to high school for my first week.
When I got to school in the morning on the first day, I realized how large the school was, and how many students went there. I ended up in the wrong classroom because of the size of the school. Luckily, a kind senior showed up and guided me to my homeroom before I was late. I was happy to see that in a class of unfamiliar (不熟悉的) faces, the only open seat was next to my good friend Casey. My science teacher seemed like a good teacher. She was exciting and fun.
After finishing four classes without too much of a challenge, I didn’t feel too bad about ninth grade. However, the fifth class changed everything. I didn’t feel ready after all. My teacher’s name is Mr. Valassidis but he told us to call him Mr. V. Mr. V told us that we would have to write 40 essays (文章) and read AP-level books such as The Odyssey this year. I love reading and writing. But come on. 40 ESSAYS? AP-level books? Now I was afraid.
The courses in high school seem like they’re going to get much harder, but they haven’t yet. Even though my classes look hard, they look really exciting too.
The first week passed quickly. Although a lot of things were overwhelming (令人不知所措的): the size of the campus, the crowds (人群) and the seniors, having a totally different experience than I had ever had before was really exciting. Now, I’m really happy about high school. I have lots of friends in my classes, I really like my teachers and I’m meeting new people.
1. How did the author feel when his high school life was about to start?| A．Happy. | B．Nervous. | C．Relaxed. | D．Helpless. |
| A．He was late for class. | B．He was praised by Mr. V. |
| C．He got lost on the campus. | D．He met Casey for the first time. |
| A．The strict rules in classes. |
| B．How his science teacher behaved. |
| C．What he was expected to do with his studies. |
| D．The reading homework on the first day of high school. |
| A．Hard and unexpected. | B．Busy but eye-opening. |
| C．Tiring but meaningful. | D．Different and exciting. |
7 . The African elephant holds the record for sleeping the least among mammals — about two hours a day — but now, the elephant seal is giving its namespace a run for its money. Recent experiments on elephant seals showed the animals averaged only two hours of sleep per day during the seven months out of the year they spent at sea.
Jessie Kendall-Bar, a Ph. D. at the University of California, discovered elephant seals’ special ability. She found in the open ocean, elephant seals sleep less than two hours per day. While on land, they sleep more than 10 hours a day. “That’s really special,” she says. Previous observations had shown that elephant seals in the open ocean surface for a couple of minutes at a time. So scientists knew that they must be sleeping underwater. But they knew very little about it.
To find out more, Kendall-Bar developed a headcap to gather data about the animals’ brain waves, heart rates, dive (潜水) depths, and movements to determine when they were sleeping. She discovered that seals do not sleep in two-hour bursts. Instead, they take some “catnaps (小睡)” lasting less than 20 minutes each. Starting at the surface, adult seals take 10-minute dives at great depths, usually from 300 to 1,000 feet.
At this point, the animals enter the first stage of sleep, or slow-wave sleep. Then, they fall into REM sleep, when their bodies turn upside down. It seems REM sleep at great depths is risky because of the inability to escape at that moment. “It is just scary to imagine an animal doing this underwater in that state,” says study co-author Terrie Williams.
But what’s likely happening is that the seals are sleeping at great depths where their primary hunters — sharks and killer whales — hardly appear. “The elephant seal is basically using its ability to div e really deep as a protective mechanism (机制),” says Kendall-Bar. “It doesn’t have to keep one eye open or stay awake. It’s sleeping with its entire brain.”
1. Why does the author start the text with the African elephant?| A．To point out the sleep problems of animals. |
| B．To introduce elephant seals’ sleeping patterns. |
| C．To praise elephant seals’ great ability to survive. |
| D．To stress the importance of getting enough sleep. |
| A．Their sleep habits vary by location. |
| B．They spend a long time playing in the sea. |
| C．They can enter a stage of deep sleep quickly. |
| D．Their brain waves are slower than other large animals’. |
| A．It’s a common group activity. | B．It can increase their heart rates. |
| C．It’s made up of a series of short sleep. | D．It helps them develop their swimming ability. |
| A．To get sufficient food easily. | B．To escape from loud noises. |
| C．To maintain their body temperature. | D．To avoid attack from natural enemies. |
8 . Craig Clark is retired from his job in computers. He grew bored in his retirement and wanted to take on a challenging hobby. He decided to continue doing what he does best, which is to fix computers. In his spare time, he helps individuals and families improve their lives by giving them access to technology.
Craig places ads for his donations on the neighborhood community website. Once he fixes the old computers, he then offers them to community members for free. He was aware that many individuals struggled financially and often couldn’t afford to buy a computer due to the expense (费用). He wanted to find a way to help solve this problem. So far, he has given away more than 430 computers.
Melissa, one of Craig’s computer receivers, proves his giving nature. Her daughter needed a computer for school. But as a single mother of four children, buying a new expensive computer was not in her budget. One day she received a free computer from Craig. It was a lifesaver for her family.
A computer can influence people in many ways. It helps the elderly easily connect with health professionals from the comfort of their homes. It also saves them time and money by having their medicine and food delivered and monthly bills paid with the help of their online accounts. Computers have also connected many young students with online educational programs. They have also helped families connect with relatives living far away through email, social media, and video meetings.
Craig is excited that his labor of love is beneficial to those in need. He is known in his Florida community as the Tech Fairy. He uses his IT skills as a unique way to help improve the lives of hundreds of his community members. He now wants to inspire other technicians (技术员) to join him on his mission of kindness and become tech fairies in their own communities. Together they can improve the lives of many.
1. What does Craig prefer doing in his spare time?| A．Finding solutions to poverty. | B．Selling computers at a low price. |
| C．Repairing and donating computers. | D．Teaching computer-fixing skills. |
| A．Wise and independent. | B．Clever and energetic. |
| C．Brave and determined. | D．Skilled and generous. |
| A．Community members’ gratitude to Craig. |
| B．Local people’s useful advice on Craig’s business. |
| C．The common types of online educational programs. |
| D．The life-changing benefits brought by Craig’s action. |
| A．A tech fairy connects people with technology |
| B．A man calls on people to recycle used computers |
| C．A fun way to improve community relationships |
| D．A man chooses to be a volunteer in his retirement. |
9 . The southwestern United States has experienced drought for more than 20 years. Arizona has increasingly pumped (抽吸) water from underground, but that meets less than half of what the state needs. Meanwhile, tens of thousands of new residents arrive every year, and more communities are built. One report shows that a large area near Phoenix doesn’t have enough groundwater for all the homes that developers want to build there. That means 800,000 people.
Some experts say the solution is to import water from outside the state. One idea is to build a $5.5 billion desalination (脱盐) plant on Mexico’s Sea of Cortez. The plant would remove salt from the water and pump that water to Arizona through a 200-mile pipeline. Supporters say this could provide a water supply for decades.
Environmentalists see a different future. Some of the salt taken out of the Sea of Cortez might end up back in the ocean, harming wildlife. The pipeline would damage land where people and animals live. And the desalination process uses lots of energy. This would create greenhouse gases, the very gases that are causing the conditions that have led to Arizona’s water problems.
Margaret Wilder is a professor at the University of Arizona, in Tucson. She warns that big projects like this one could be used to show much more unsustainable development in the desert in the future. Moreover, desalinating water would likely be a massive expenditure for Arizonans. Cities pay about $50 to $150 for 326,000 gallons. That’s enough for a family of three in Phoenix for a year. Desalinated water could charge 20 times as much.
Environmentalists say the government should focus on cutting the demand for water rather than increasing the supply. That would mean taking water-saving measures and limiting how many homes are built. Thousands of households in Tucson, Arizona, are collecting rainwater and using it for cooking, drinking, and in their gardens. Government leaders have taken notice. Tucson also helps residents pay for equipment that collects rainwater for home use.
1. What is the problem faced by the southwestern United States?| A．A population increase. | B．A serious heatwave. |
| C．A waste of resources. | D．A water shortage. |
| A．It provides a long-term solution to drought. |
| B．It would harm the planet from various aspects. |
| C．It fails to take people’s basic needs into account. |
| D．It draws people’s attention to environmental destruction. |
| A．Affordable. | B．Costly. | C．Unsafe. | D．Beneficial. |
| A．People are unsatisfied with the government’s water measures. |
| B．Collecting rainwater is the key to meeting water demands. |
| C．People are exploring water resources with official support. |
| D．Public concern about water safety has increased. |
10 . One good part about school is field trips. Students can get out of the classroom and into the real world, even if just for a few hours.
Students do better in school. Students who go on field trips generally have better grades.
Students learn to be more independent. A field trip includes many things. Although adults are in charge, it’s also up to students to figure out what exhibits they want to learn about, how they can finish certain tasks, etc. During field trips, students can have many such situations to learn to be independent. In the process, they sometimes may feel unpleasant and stressed.
Students develop a stronger connection to a neighborhood. By getting out of the classroom and, into the streets, students can become more familiar with a neighborhood.
| A．Students master more social skills. |
| B．So students can develop lifelong friendships. |
| C．And they have higher graduation rates from school. |
| D．These trips, wherever they are, can influence students. |
| E．But they’ll see their ability to deal with problems alone improve. |
| F．They will learn more about its culture, environment, population, etc. |
| G．Teachers’ detailed guidance will help students behave well in school. |
