Gitanjali Rao, a teenager who invented a mobile device to test for lead(铅)in drinking water, is Time's Kid of the Year for 2020. The magazine announced the award Thursday, indicating Rao's ability to apply scientific ideas to real-world problems and her desire to motivate other kids to take up their own causes.
It's just the latest recognition for Rao, 15, who was named last year to the Forbes 30 Under 30 list(福布斯30岁以下青年才俊榜).She won praise in 2017 after she created a device named Tehys, using carbon nanotube sensors to detect lead in water. She was named America's Top Young Scientist when she was in the seventh grade. She went on to collaborate with scientists in the water industry to try to get the device on the market.
More recently , Rao has developed a phone and Web tool named Kindly, which uses artificial intelligence technology to detect possible early signs of cyberbullying(网络欺凌).
Rao was chosen in part because of the way she has followed up her technical work with efforts to get other young people to work on solving the problems they see. "I don't look like the typical scientist. Everything I see on TV is that it's an older, usually white man as a scientist,” she said. “My goal has really shifted not only from creating my own devices to solve the world's problems, but inspiring others to do the same as well. Because, from personal experience, it's not easy when you don't see anyone else like you. So I really want to put out that message: If I can do it, you can do it. and anyone can do it.”
1. What made Rao win Time's Kid of die Year?A.Her invention and inspiration to others. |
B.Her ability to ensure kids' drinking water. |
C.Her motivation to solve practical problems. |
D.Her way of influencing other young people. |
A.She developed a tool called Kindly. |
B.She created a device called Tehys. |
C.She won America's Top Young Scientists. |
D.She became one of the Forbes 30 Under 30. |
A.Compete. | B.Exchange. | C.Cooperate. | D.Bargain. |
A.She wants to be a typical scientist. | B.She once suffered cyberbullying. |
C.She lived a hard life when young. | D.She encourages others to do like her. |
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【推荐1】When Jack Andraka was 15 years old, he created a new diagnostic test for pancreatic cancer. Jack's test is 28 times faster, 26,000 times less expensive and over 100 times more sensitive than the current diagnostic tests. His test earned him first prize at the Intel International Science and Engineering Fair, which is like the Olympics of science fairs.
It was after a close family friend died of pancreatic cancer that Jack Andraka became interested in finding a better early-detection diagnostic test. Jack said the solution came to him during his high school biology class. He was secretly reading an article about nanotubes while the teacher was talking about antibodies. Jack said the two ideas came together in his head, and he thought he could combine what the teacher was saying with what he knew about nanotubes to create an early detection test for pancreatic cancer.
Jack Andraka used what he found through Google searches and free online science journals to develop a plan and a budget. Jack contacted about 200 people including researchers at Johns Hopkins University and the National Institutes of Health with a proposal to work in their labs. He got 199 rejections before he finally got an acceptance from Dr. Anirban Maitra, Professor of Oncology at Johns Hopkins School of Medicine. Jack worked after school every day, on weekends and over holidays at Maitra's lab until he developed his test.
So, think about Jack Andraka the next time you hear that something can't be done. Or, if you receive numerous rejections (close to 200 in Jack Andraka's case) or you're simply hesitating to give one of your ideas a shot. Also, keep in mind that you don't necessarily need a giant team, billions of dollars in resources or even more than 15 years of life experience to do something amazing.
1. Why did Jack decide to work on the diagnostic test?A.The existing test was not widely used. | B.He wanted to win a prize in a science fair. |
C.A family friend died of pancreatic cancer. | D.He got inspired in his high school biology class. |
A.By cooperating with Google. | B.By doing experiments in the lab. |
C.By conducting researches online. | D.By contacting about 200 people. |
A.Life Style & Trends | B.Hospitals & ICUs |
C.Inspirational Stories | D.Interesting Discoveries |
【推荐2】Some of the world's most well-known brands, including Ericsson, Volvo and Ikea, all originated from Sweden. The country also brought us the zipper, used by many men in the world on a daily basis, according to Swedish Wire, a news website.
With a population of barely over 9 million and gross domestic production (GDP) at about $538 billion in 2011—just a thirteenth that of China. Sweden seems like an unlikely candidate for a leader of innovation (创新). Yet, for the past three years, it has consistently topped the European Commission's Regional Innovation Scoreboard, coming first in 2010 and 2012, and second in 2011.
Sweden's neighbors, including Denmark, famous for such brands as Nokia and Lego, are also known for their innovative cultures.
How have these Scandinavian countries managed to make these achievements?
Pasi Sahlerrg, Director General of the Finnish Ministry of Education and Culture's Centre for International Mobility, believes the education system is central to the success of Scandinavian countries. A key feature of this system is that every child's education is personalized and teachers are highly trained.
"In Finland, 'School-readiness' means getting the school ready to meet the needs of its students, rather than getting the students ready for school," said Sahlerrg.
Limited homework, no standardized tests and the absence of a national curriculum are intended to teach students how to manage themselves independently and to organize their time creatively, both vital for encouraging innovation.
Of course, there are factors beyond the education system that also determine the rate of innovation. So how to imitate Scandinavia's success in innovation? Foster (培育) a well-educated generation, provide it with the necessary financial resources, establish a supportive policy environment for it to turn the innovative ideas it generates into success.
1. The first paragraph is written to ________.A.introduce the topic of the text | B.describe some quality products |
C.list some famous brands from Sweden | D.quote a Swedish website |
A.was Number One in innovation over the past three years |
B.is well-known for its innovative cultures |
C.presents to the world such brands as Nokia and Lego |
D.had a very high GDP in 2011 |
A.school-readiness | B.the system of education |
C.teacher training | D.personalized teaching |
A.Loads of homework. | B.Strict examinations. |
C.No national curriculum. | D.Necessary financial resources. |
【推荐3】Wood has many great characteristics that make it the perfect building material.It is cheap,durable,easily available,and most importantly,environmentally sustainable.The one thing it is not,is transparent! Now thanks to a team of scientists at Stockholm’s KTH Royal Institute of Technology the material may even be able to add that feature to its already impressive list.
Lead researcher Dr,Lars Berglund said he was inspired to create the transparent wood after learning how Japanese researchers had developed a see-through paper for use in flexible display screens for electronic devices.The team began by pulling out the wood’s lignin(木质素).The lignin-free wood was then dipped into a polymer(聚合物)and baked at a temperature of 158°F for four hours.The result was a hybrid product that was not only stronger and lighter than the original wood but also,almost transparent.The researchers were able to adjust the level of transparency by varying the amount of the polymer injected and also by changing the thickness of the wood.
While scientists have previously created a see-through wood for small-scale applications like computer chips,the transparent wood is the first one being considered for large scale applications.The researchers,who revealed their findings in Biomacromolecules on April 11,picture using the transparent wood in buildings to allow for more natural light,or to create windows that let in the desired amount of light without sacrificing privacy.
Wood that allows light to pass through could lead to a brighter future for homes and buildings.Berglund also thinks the wood could play a significant role in the design of solar panels.The semitransparent material would be able to keep light longer and give it more time to interact with the conductor,thus resulting in better solar efficiency.Additionally,substituting the currently used glass with this new product would help solar energy manufacturers improve their carbon footprint and lower the cost.They are now experimenting with ways to scale up the manufacturing process so that the transparent material is cost-effective to make and easy to use.
1. What does the underlined part“that feature”in Paragraph 1 refer to?A.Cheap. | B.Durable. | C.Sustainable. | D.Transparent. |
①Dip the wood into a polymer. ②Adjust the amount of the polymer.
③Make the wood lignin-free. ④Bake the wood for some time.
A.③→①→④→② | B.③→①→②→④ |
C.①→②→③→④ | D.④→③→②→① |
A.Berglund got the idea of transparent wood while making paper. |
B.Varying the amount of the polymer changes the wood’s hardness. |
C.The transparent wood would be used only for homes and buildings. |
D.The cost of making the transparent wood still needs to be cut down. |
A.The bright future of the transparent wood. |
B.The wood’s role in the design of solar panels. |
C.The disadvantages of the currently used glass. |
D.Solar energy manufacturers’carbon footprint. |
【推荐1】Before the year has even come to a close, climate experts are certain that 2023 will be the hottest year in recorded history.
On Dec. 6, the Copernicus Climate Change Service (C3S) — part of the European Union's space program — revealed that this year's average global temperatures have been 2.6℉ (1.46°C ) higher than temperatures in preindustrial times and 0.2°F (0.13°C) higher than January to November in 2016. These “extraordinary” temperatures mean that 2023will be “the warmest year in recorded history,” C3S deputy director Samantha Burgess said in a statement.
The researchers note that this year's record heat was partly caused by the latest El Nino event — a phenomenon where warmer water near the equator triggers warmer global air temperatures — that began in June. Some other experts have suggested that the January2022 eruption of Tonga's underwater volcano, which pumped record levels of water vapor into the atmosphere, may also be partly responsible.
Despite these factors, the major cause of climbing temperatures is global warming caused by runaway greenhouse gas emissions, which, noted in a C3S statement, have trapped more than 25 billion atomic bombs' worth of energy in our atmosphere over the last 50 years. And still worse, the global carbon emissions have reached a new high this year, according to scientists at the United Nations Climate Change Conference of the Parties (COP28) On Dec 4.
The effects of global warming are becoming more obvious. In 2023, research revealed that climate change is causing major US cities to sink and more than half of the world's largest lakes and reservoirs to shrink. Studies also predicted that the Gulf Stream, which plays a vital role in ocean circulation, could collapse by as early as 2025, and that rising sea levels could swamp the U S coastline by 2050.
However, scientists say that we still have time to prevent further disaster. Leading climate change expert Michael Mann, from the University of Pennsylvania, recently wrote that “we can still stop the worst effects of climate change” if we stop emitting greenhouse gases as soon as possible.
1. What's the purpose of the text?A.To report the recorded hottest year. |
B.To present findings of a research. |
C.To analyze the causes of climate change. |
D.To warn of the coming natural disaster. |
A.Eruption of an underwater volcano. |
B.Greenhouse gas emissions. |
C.Collapse of the Gulf Stream. |
D.The latest El Nino event. |
A.Scientists' predictions of the future. |
B.The threat of rising sea levels to the U.S. |
C.The effects of climate change. |
D.Different opinions on global warming. |
A.Confused. | B.Worried. | C.Pessimistic. | D.Hopeful. |
【推荐2】An aircraft carrying personal protective equipment donated by China, along with U.S.-purchased medical supplies, arrived in New York on March 29.
The plane is the first in a series of flights over the next 30 days organized by the White House to help fight the coronavirus, the White House said. Most of the purchases are from Asia including Malaysia and Vietnam.
The Chinese Embassy in the U.S. retweeted a report from Axios, which said that 12 million gloves, 130,000 N-95 masks, 1.7 million surgical masks, 50,000 gowns, 130,000 hand sanitizer units, and 36,000 thermometers from China have arrived in the United States.
Along with the goods, Chinese company Huawei donated 10,000 masks, 20,000 articles of protective clothing, 10,000 gloves and 50,000 goggles to New York state.
Governor Andrew Cuomo confirmed the donation and thanked Huawei on Twitter.
The plane was funded by the Federal Emergency Management Agency. It landed at John F. Kennedy airport carrying gloves, gowns and masks for distribution in New York, New Jersey and Connecticut, three hard-hit states battling to care for a crush of coronavirus patients.
The airlift is a product of a team led by White House senior adviser Jared Kushner, which formed "Project Airbridge," a partnership between large U.S. healthcare distributors such as Mekesson Corp, Cardinal, Owens & Minor, Medline and Henry Schein Inc, and the federal government.
The flight from Shanghai was the first of about 20 flights to arrive between now and early April, according to the White House. Additional flights will carry similar gear from China, Malaysia and Vietnam.
1. From the passage we know that ________.A.all goods on the plane are donated by China |
B.all goods on the plane are purchased from China |
C.all goods on the plane are donated by Huawei |
D.some of the goods on the plane are from donation while others are purchased from Asia |
A.New York. | B.New Jersey. |
C.California. | D.Connecticut. |
A.Protective equipment and medical supplies. |
B.Parts of the machine. |
C.Medicine. |
D.Food. |
A.A textbook. | B.A collection of stories. |
C.A guide book. | D.An official report. |
【推荐3】COVID-19 vaccinations are underway. Anthony Fauci, director of the National Institute of Allergy and Infectious Disease, has said that approximately 75 to 90% of Americans will need to be vaccinated to reach herd immunity in the United States. Public health experts recommended a staged approach to vaccination. Demand for the vaccine exceeded capacity in the beginning. Vaccine manufacturers ramped up production to meet the demand; however, public interest in getting vaccinated has been waning. The U.S. adopted the following staged approach, but by May 1, 2021, most of the country had already reached stage 2:
Stage 1a includes healthcare personnel and residents of nursing homes and assisted living facilities. Stage 1a vaccinations began in December 2020.
Stage 1b includes frontline essential workers: police officers; food and agricultural, postal, daycare, public transit, grocery store, public transit, and manufacturing workers; teachers; and people aged 75 and older. (Some states are allowing people 65 and older to register for the vaccine.) Some states began Phase 1b vaccinations during the second full week of January 2021.
Stage 1c includes people aged 65 to 74 and people ages 16 to 64 who have underlying health conditions that increase the risk of COVID complications. Essential workers of any age in the transportation, logistics, food service, construction, communications, information technology, energy, law, media, public safety, and public health sectors are also in Phase 1c. Many states were able to vaccinate Phase 1c in March and April.
Stage 2 includes all other people aged 16 and older. (A COVID-19 vaccine is now authorized for teens age 12 and older.)
1. When did healthcare personnel begin to get vaccinated?A.May, 2021. | B.December, 2020. | C.January, 2021. | D.March, 2021. |
A.Increasing. | B.Decreasing. | C.Changing. | D.Improving. |
A.To reach herd immunity, more than 90% of Americans needed to be vaccinated. |
B.Most states of America had already reached stage 1c by May 1, 2021. |
C.In stage 1b a man aged 66 can get vaccinated in some states of America. |
D.All people ages 12 and older will get vaccinated at the end of the staged approach. |
【推荐1】Do you know an outstanding junior high or senior high school teacher, coach, guidance counselor (辅导员), librarian, or headmaster? Nominate (提名) that special teacher you’ll always remember and give him/her the chance to be recognized in a famous national magazine through “Educator of the Year Contest”!
Prizes
Cash awards will be given to those from across the country who are given the honor of Educator of the Year. Besides, your winning essays will also be published in our magazine.
Guidelines
We will only consider essays written by teens. Nominations must be for junior high or senior high school educators only. Elementary school educators are not suitable.
Convince us your educator is special. Tell us about his or her style of teaching, his or her role in school activities, and community service. What has your educator done for the entire school, for your class, for you or for other students? Tell us some stories about your teacher with specific details. Keep your essay between 200 and 1,000 words. Remember to include the first and last name, position, and school of your educator in your essay.
Don’t forget to submit your essays through our website. You can also read our submission guidelines for more information on this website.
Deadline
The deadline for submitting your essays is December 30. If your essays are accepted, they will appear in our magazine all over the year. Winners will be made public after the January issue is published.
1. What is the purpose of the contest?A.To make the magazine popular. |
B.To choose “Educator of the Year”. |
C.To stress the importance of teachers. |
D.To encourage people to be teachers. |
A.Librarians in senior high school. |
B.Teachers in junior high school. |
C.Students in junior high school. |
D.Guidance counselors in senior high school. |
A.Your teacher’s previous honors. |
B.The basic information of your school. |
C.Some examples of your special teacher. |
D.Your appreciation of your teacher’s hard work. |
【推荐2】Breathtaking Underwater Destinations
Conrad Maldives Rangali Island-Rangali Island, The Maldives
This island resort is famous for its Ithaa Undersea Restaurant, the world's first all-glass dining establishment completely built underwater. It's also one of the only places in the world where you shouldn't be afraid of sharks staring at you.Above ground, Conrad Maldives Rangali Island provides beautiful views of the Indian Ocean.
Atlantis The Palm - Dubai, United Arab Emirates
Atlantis The Palm was the first resort built on an island and lies on the world's largest man-made island, Palm Jumeirah. It also offers floor-to-ceiling views of the sea in its underwater suites, even ,in the bathrooms. Guests can dine at not one,but two underwater restauran ts. Poseidon Cafe and Ossiano.
Please Note: The hotel is currently undergoing a three-year renovation(翻修)-due for completion by 2019.Guests should expect low-level interruption during construction hours (10 a. m-6 p. m )
Utter Inn - Vasteras, Sweden
It's an art project designed by artist and sculptor Mikael Genberg, which conveniently doubles as a hotel room. Guests enter the Utter Inn through a red Swedish-style house floating on the water. and then climb down a hatch(舱口) in the floor for the main attraction: the underwater bedroom surrounded by windows looking into Sweden's Lake Malaren。
Planet Ocean Underwater Hotel-Key West, FL
Located 30 feet below the surface, the hotel's 12 bedrooms are accessible via a glass elevator and provide an overall view of marine life. A marine biologist will accompany guests to explain the marine life around them Besides, the hotel will travel to other places -Japan, Singapore, and Thailand are listed on the hotel's website-to bring the experience to other citizens of the world.
1. What is Ithaa Undersea Restaurant famous for?A.The overall view of underwater life. |
B.The first restaurant built on a man-made island. |
C.The first underwater restaurant totally made of glass. |
D.The only underwater restaurant without sharks around. |
A.Utter Inn. | B.Atlantis The Palm. |
C.Ithaa Undersea Restaurant. | D.Planet Ocean Underwater Hotel. |
A.It locates under water. | B.It's under repair. |
C.Its guests can travel free. | D.It is moveable. |
【推荐3】When emergency workers arrive at an old firehouse in New York City, the way they greet each other is not what you might expect. These first responders say," Ni Hao! " "Ni Hao" means "hello" in Mandarin Chinese.
First responders are the first emergency workers to arrive at a fire, traffic accident or other emergency. Some first responders are fire fighters, while others can be Emergency Medical Technicians.
In Brooklyn, New York, over 20 first responders are studying Mandarin Chinese for about two hours a week. The class is the first of its kind. It is offered by the New York City Fire Department Foundation.
The U. S. Census Bureau recently reported that some New York neighborhoods are made up mostly of immigrants. Some people have predicted that the Chinese community is likely to become New York's largest immigrant group. They think the city will have the largest Chinese community outside of Asia.
The Census Bureau also found that almost 200 languages are spoken in the city. So, knowing different languages is important, especially if you are a first responder.
Lieutenant(中尉,少尉) Steve Lee is president of the Fire Department's Phoenix Society. He says that first responders must be able to communicate quickly and effectively when an emergency happens. He explains that first responders enter neighborhoods and communities to assist regardless of where they are from. Many times first responders do not speak the same language as the people they are called to help. He adds that it is vital, or very important, that first responders are able to communicate with the people calling for help.
Without help from homeowners and others, Lee adds, discovering exactly where a fire is burning can be a real problem. First responders need to ask questions such as "What building? What address? What apartment?" And the most important question," Is there anybody left in the building and where?"
1. Who are first responders according to Paragraph 2?A.People first learning the disaster. | B.Persons leading the emergency rescue. |
C.Rescuers first reaching the disaster | D.People first find the disaster. |
A.To show respect to the Chinese immigrants. |
B.To learn about Chinese cultures much better. |
C.To meet the rapid growth of Chinese population. |
D.To find a better job in Chinese community. |
A.The place where the fire occurs. | B.The people trapped in the fire. |
C.The language to communicate. | D.The distance covered to the fire. |
A.Mandarin Being a Must for Emergency Workers |
B.New York's Emergency Crews Learning Mandarin |
C.Language Problem Disturbing First Responders' Work |
D.Importance of Languages Used in Emergency Rescue |
【推荐1】She was three, just released from a hospital after brain surgery (手术). I was happy to have her back. My little “Mr. Clean ” (shaven head) and I went to our local mall.
“Daddy, can I get a treat? ” “OK, but just one, ” I replied. We got to the mall and walked hand in hand towards the entrance. I asked her what she wanted for her treat. Without hesitation, she said " An ice-cream cone from the ice-cream store." OK, the goal was set and we were in the mall!
At the end of an ordinary lane (小巷) she found something new--a huge fountain at about the same time. “Daddy, can I make a wish?” She screamed as she jumped with pure joy. Sure honey, but that will be your treat you know, I explained. She agreed.
I pulled out a coin and placed it in her hand. She held it tightly and closed her eyes making her wish. And then like a shooting star, the coin was thrown into the water with her wish.
“Can you tell Daddy what you wished for?” She answered, “I wished I could get an ice-cream cone.” Her answer was unexpected. Needless to say, she got her wish.
Little did I know then that my beautiful girl would soon be on a long road of seizures (疾病发作), surgeries, special schools, medications and end up paralyzed (麻痹) on her right side.
Today, she is almost seventeen. She cannot use her right hand and walks with a noticeable limp (跛行). But each year she showed improvement. She is planning a career in early childhood education.With one year still remaining in high school, she and I one night planned all the courses she would need to take in community college. It was her idea. You see that failure was never an option to her.
1. Why did the author call his daughter Mr. Clean?A.Because she was a clean girl. |
B.Because she liked people who are clean. |
C.Because she had no hair. |
D.Because it was her nickname when she was born. |
A.The ice-cream cone |
B.The huge fountain |
C.The ordinary lane |
D.The coin |
A.Kind and lucky. |
B.Brave and strong. |
C.Poor and lonely. |
D.Lovely and friendly. |
A.the author did not buy his daughter the ice-cream cone |
B.the author's daughter didn't tell him her wish |
C.the author s daughter is paralyzed on her left side |
D.the author is proud of his daughter |
【推荐2】There have been thousands of marine species that have become extinct. Currently there are thousands of fish that are endangered and in great need of protection. The following are some.
The Arcadian Redfish are found in warm waters, such as the Atlantic and Indian Ocean. These fish mature at a late age (5 to 6 years) and have low reproductive rates. However, they can live to be 50 years old, which is relatively remarkable. Young redfish are marked with patches of black and green color. They don’t develop their red color until after they move to the ocean bottom. Now the Arcadian Redfish is endangered due to overfishing. These fish started to decrease in population in the early 1900s because of their increased popularity in the food industry.
The Bluefin tuna is one animal that is high on the endangered species list. This fish has been named one of the wonders of the ocean, because they can grow to be 12 feet long and weigh over 1, 500 pounds! Why are these fish disappearing at alarming rates? Because they are being captured for food, with over 75% consumed in Japanese restaurants often by making a popular sushi.
The European Eel is found in the Baltic and the Mediterranean Sea. They have a unique metamorphosis process and they change their forms over a longtime period. According to IUCNRedList.org, the European Eel is one of the threatened species that are not only endangered, but critically endangered.
The whale shark is one of many endangered sharks out there. According to one source, sharks are revered as our last “living” dinosaurs. They are known as the largest fish with the potential to grow over 60 feet long and weigh over 70,000 pounds. The whale shark also has the potential to live to be over 100 years old.
1. Which of the following is the best title of the passage?A.The Last “Living” Dinosaurs | B.The Endangered Ocean Fish |
C.The Most Popular Sea Fish | D.The Extinct Marine Species |
A.They are found in the Arctic Ocean. |
B.They are born to be red. |
C.Their survival rate is relatively low. |
D.They are slow-growing, long-lived fish. |
A.Huge size. | B.Strange color. |
C.Sharp sight. | D.High intelligence. |
A.Reduction in population. | B.Limitation in sight. |
C.Change in form. | D.Increase in weight. |
The four children, all fifth graders in Miss Rasmussen’s class at Grand Canyon School, are as different as any four 11-year-olds could be, but they have one thing in common — all are somewhat separated from their classmates. Sam is a newcomer and has had his share of school trouble before; Kelsey quietly carries her pain at losing her father; Judy’s sense of justice (正义感) always annoys others; and Brenton…well, he is another story entirely. Brenton is easily the smartest child in school, so smart that even his parents and teachers have trouble keeping up with him. When Brenton and his three classmates are put into the same study group by their teacher, the others discover that Brenton has made a time-saving gadget (装置) to do his homework for him. While the boy genius(天才) is perfectly able to do the homework himself, Sam, Kelsey and Judy could use the help.
Having perfect grades is something new for these three, and as they meet every day to “do homework”, they find that they’re learning a lot — about each other. Such a good thing can’t last though, and when a secret man starts trying to get in touch with them, the children begin to get nervous. Soon there’s an even more frightening problem — why can’t the Homework Machine be turned off?
Told in different voices (as all the children make statements to the Grand Canyon Police), the story develops in an interesting fashion. Gutman is a gifted who has written dozens of children’s books, each with a funny and impressing tale that should be equally liked by boys and girls.
1. What type of text is it?
A.A book review. | B.A school report |
C.A science story | D.A student’s diary |
A.Getting along with classmates. |
B.Overcoming sad feelings. |
C.Following school rules. |
D.Keeping good grades |
A.He is careless. | B.He is clever. |
C.He is brave. | D.He is quiet. |
A.They had no idea how to stop the machine. |
B.They lost the connection with each other. |
C.They were questioned by a strange man. |
D.They were tracked down by the police. |