1 . As the effects of climate change become more disastrous, well-known research institutions and government agencies are focusing new money and attention on an idea: artificially cooling the planet, in the hopes of buying humanity more time to cut greenhouse gas emissions.
That strategy, called solar climate intervention (干预) or solar geoengineering, involves reflecting more of the sun’s energy back into space — abruptly reducing global temperatures in a way that imitates the effects of ash clouds flowing out from the volcanic eruptions. The idea has been considered as a dangerous and fancied solution, one that would encourage people to keep burning fossil fuels while exposing the planet to unexpected and potentially threatening side effects, producing more destructive hurricanes, wildfires floods and other disasters.
But. as global warming continues, producing more destructive hurricanes, wildfires floods and other disasters, some researchers and policy experts say that concerns about geoengineering should be outweighed by the imperative to better understand it, in case the consequence of climate change become so terrible that the world can’t wait for better solutions.
One way to cool the earth is by injecting aerosols (气溶胶) into the upper layer of the atmosphere. where those particles reflect sunlight away from the earth. That process works, according to Douglas MacMartin, a researcher at Cornell University.
“We know with 100% certainty that we can cool the planet,” he said in an interview. What’s still unclear, he added, is what happens next. Temperature, MacMartin said, is an indicator for a lot of climate effects. “What does it do to the strength of hurricanes?” he asked, “What does it do to agriculture production? What does it do to the risk of forest fires?”
Another institution funded by the National Science Foundation will analyze hundreds of simulations of aerosol injection, testing the effects on weather extremes around the world. One goal of the research is to look for a sweet spot: the amount of artificial cooling that can reduce extreme weather events without causing broader changes in regional rainfall patterns or similar impacts.
1. Why do researchers and government agencies work on cooling the earth?| A．To prevent natural disasters. | B．To win more time to reduce gas emissions. |
| C．To imitate volcanic eruptions. | D．To encourage more people to bur fossil fuels. |
| A．More volcanoes will throw out. |
| B．More solar energy will go into space. |
| C．More disasters will endanger the future of the world. |
| D．People will keep burning fossil fuels to keep warm. |
| A．He thinks more research remains to be done. |
| B．He is optimistic about the effect of cooling the earth. |
| C．He is concerned about the reduction in agriculture production. |
| D．He disapproves of the practice of solar climate intervention. |
| A．The rainfall pattern of a region. |
| B．The modest drop in temperature. |
| C．The number of extreme weather events. |
| D．The injection amount of aerosol. |
2 . You go to the coffee shop and take your coffee to go. You enjoy your drink, and then throw the paper cup in the garbage. Or do you put it in the recycling? I's confusing. A lot of us—people everywhere—are using to-go cups these days. A recent report said that there are 600 billion cups-billion with a ‘b’- that are produced and sold globally on an annual basis So that`s a lot, " say Christy Slay with The Sustainability Consortium. Starbucks alone says it contributes 1 percent of those disposable cups: That's an estimated 6 billion cups a year.
To help reduce those numbers. Starbucks and McDonald's are launching a three-year project to build a better cup: one that's both fully recyclable and compostable. Here's the big problem with the paper one you get there and in other coffee shops. “They look like paper, but they actually have a thin layer of plastic on the inside,” Slay says. That plastic coating keeps the cups from leaking. The problem is that it also makes the cups really hard to recycle, and only a few facilities in the world can do it.
A few companies have already rolled out compostable coffee cups. But Dylan de Thomas with The Recycling Partnership says there is a problem with those cups, too. "Typically they're compostable in industrial settings, so not your backyard compost that you and I might have, but at fairly technically advanced composting facilities." There aren't a lot of those facilities around, either.
So why exactly, in the 21st century, is it so hard to produce a better paper cup? "It's not necessarily very technically hard, though there are technical problems to overcome to make something recyclable and compostable, says Bridget Croke with Closed Loop Partners, a firm working to build what they call a circular economy. It's a fancy way of talking about turning waste into value. Almost anything is technically recyclable, Croke says. "But recycling is a business, and if materials can't move through the recycling system and be turned into a product that has value, they're not functionally recyclable.”
1. What are people puzzled at about the paper cup?| A．How to deal with the used one. | B．Why people reject it carelessly. |
| C．What makes it hard to compost. | D．Why Starbucks uses so many cups. |
| A．It helps make the cup more portable | B．It makes the cup easily recyclable. |
| C．It prevents the water from escaping | D．It promotes the extended use of the cup. |
| A．Its future is promising | B．It is not a profitable business. |
| C．technical problems are unsolvable | D．A more recyclable cup will be put into the market. |
| A．How can we design a better paper cup? |
| B．Why is it so hard to recycle paper cups? |
| C．What can we do to lessen the need of paper cups? |
| D．What damage do paper cups cause to our environment! |
3 . 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. |
4 . According to a survey, the waste of food on the dining table occupies 10% of the total grain output. Last week Meituan co-published a proposal with a number of business organizations, calling on restaurants to stop food waste and help develop new eating habits for customers. “Restaurants should use official accounts on social media and live-streaming to promote and advocate food-saving actions,” the proposal said.
Meituan and the organizations are advocating that merchants offer guidance for consumers, including reminding them during the ordering process about the taste of the ingredients, portion sizes and other information about the dishes, to help them avoid food waste due to misleading information.
Catering associations in more than 18 provinces have also joined the campaign to remove food waste. The Wuhan Catering Association proposed an “N-1” ordering code for restaurants in which a group of 10 diners would only order enough for nine people. More food is only brought to the table if required. It has inspired people to rethink their relationship with food and waste.
On Friday, the China Cuisine Association announced that it had teamed up with Ele. me, a food delivery platform, to launch a “ half-dish plan", encouraging restaurants to provide customers with the option to order smaller portions. Besides, customers are encouraged to take their leftovers home.
To reduce food waste on social media platforms, some popular video platforms have stepped up content reviews of food-related live streams and implemented regulation of online eating shows. Now, if users search certain keywords, such as “eating show" or “competitive eaters", a cautionary message pops up to remind them to cherish food and keep a reasonable diet.
1. What is the purpose of the proposal mentioned in the passage?| A．To monitor food sales on social media and live-streaming. |
| B．To expand the business and competitive ability of Meituan. |
| C．To encourage restaurants to take measures to reduce food waste. |
| D．To promote cooperation between Meituan and other organizations. |
| A．By doing a survey. | B．By offering analysis. |
| C．By making comparisons. | D．By giving an example. |
| A．Purchasing their favorite food. | B．Buying proper amounts of food. |
| C．Following some competitive eaters. | D．Leaving their leftovers in the restaurant. |
| A．Appears unexpectedly. | B．Spreads widely. |
| C．Moves quickly. | D．Fades slowly. |
5 . Beijing Opera, as one of Chinese traditional opera forms, is regarded as the national opera of China and well received all over the world.
Beijing Opera arose in the late 18th century with a history of more than 200 years whose origin can date back to some old local operas, especially the Anhui Opera. It became fully developed and recognized by the mid-19th century. Now it's the biggest kind of opera in China, whose popularity spread all over the country, becoming the most popular dramatic (戏剧的) form on Chinese stage.
There are four basic methods employed in a Beijing Opera performance: chang, nian, zuo, da. Generally speaking, chang means singing, and nian recitation (背诵) and oral communication, while zuo means the facial and body expressions and acting and da is Chinese Kungfu. Beijing Opera also has four main types of performers namely Sheng, Dan, Jing and Chou. Sheng and Dan mean the main roles in the opera. The painted face, in Chinese called 'jing', is a name for the role of the man that has some special characteristic or appearance. Chou is easily understood from the role's name as a clown with an ugly appearance, who is to provide light relief and comedy.
In recent years, Beijing Opera has tried to make some changes, including improving the performance quality. Widely spreading all over China with great influence, Beijing Opera contains the spirit of Chinese national culture, but the shortage of funding has become a big problem as the form enters the 21st century. There is no doubt that it is a treasure of Chinese culture!
1. What does Paragraph 2 mainly tell us?| A．The history of Beijing Opera. |
| B．The great influence Beijing Opera has on us. |
| C．Beijing Opera is popular in China. |
| D．The relationship between the Anhui Opera and Beijing Opera. |
| A．Chang | B．Nian | C．Zuo | D．Da |
| A．Sheng | B．Dan | C．Jing | D．Chou |
| A．Very bright. | B．Certainly dark. |
| C．More popular. | D．Much uncertain. |
6 . A few months ago, Jason asked his parents to buy him a computer. All his friends already had one, so his mom and dad agreed. During the first few weeks, Jason spent a lot of time in front of his computer because he had to learn how it worked. He was really interested in learning all about it and he even started writing computer programs himself.
One day Jason found a website where he could play chess either against the computer or against other people from all over the world. From then on, Jason seemed to have just one interest in life, his computer. Whenever his parents told him that he was spending too much time with his computer, Jason went into denial. He did not think that he had a problem at all.
Then the unthinkable happened: Jason's computer broke down. But his parents decided not to buy him a new one. Jason said that he needed a computer for school, and he promised that he'd spend less time with it. But his parents refused to give in. Finally, Jason felt so hopeless that he took the only way out and killed himself.
Robert Johnson, a psychologist (心理学家) on the subject, says, "Computer addiction is an illness that can influence anyone of us. Nowadays, increasing numbers of people are spending more and more time working with computers. While this isn't a problem for most users, some people, especially teenagers, often use the computer to get away from the real world. This is especially true of shy people. For them, meeting people online is a way of hiding their true selves. In cyberspace (网络空间), they can be whoever they want to be and create their own virtual (虚拟的) world. But what happens when they can no longer enter their virtual world?"
1. Why did Jason want to buy a computer according to Paragraph 1?| A．To play chess. | B．To make friends |
| C．To avoid being an outsider(外人). | D．To write computer programs. |
| A．Jason enjoyed himself | B．Jason would not listen |
| C．Jason would turn it off | D．Jason changed his mind |
| A．Fine | B．Terrible | C．So so. | D．Unknown. |
| A．it is impossible to beat computer addiction | B．teenagers should stay away from computers |
| C．shy people get addicted to computers easily | D．computers are getting us into serious trouble |
7 . The United Nations'World Food Program, WFP, won the Nobel Peace Prize on Friday. The Norwegian Nobel Committee is recognizing the group for its efforts to fight hunger and improve conditions for peace in areas affected by conflict. The award comes with a gold medal and $1.1 million --a small amount compared to the money the WFP needs for its work. So far in 2020, the UN agency has received almost $6.4 billion in goods and other donations.
The World Food Program has long specialized in getting assistance to some of the world's most dangerous places. For example, the WFP has air-dropped food in South Sudan and Syria. It also created an emergency service that kept working as COVID-19 delayed many flights.
In 2019, the UN agency provided aid to almost 100 million people in 88 countries. Berit Reiss-Andersen, chairman of the Norwegian Nobel Committee, said on Friday, “With this year's award, the committee wishes to turn the eyes of the world to the millions of people who suffer from or face the threat of hunger.” In announcing the award, the Nobel committee noted that “Until the day when we have a medical vaccine (疫苗），food is the best vaccine against chaos.” And it added, “there will be 265 million starving people within a year, so of course this is also a call to the international community not to underfund the World Food Program.”
In Geneva, a WFP spokesman told reporters: “When everything went into shutdown mode, the World Food Programme was there. When everyone was leaving, the World Food Programme had to provide the support that the world deserved.”
Dan Smith is director of the Stockholm International Peace Research Institute. He said the Nobel committee had wanted to send a message of both hope and support for international cooperation. “Hunger, like climate change, the pandemic (疫情） and other issues, is a world problem that can only be properly addressed through cooperation,” he told Reuters news agency.
1. The WFP won the Nobel Peace Prize because it| A．offered assistance to Sudan |
| B．fought hunger to promote peace |
| C．created services against COVID-19 |
| D．collected goods and donations |
| A．could always offer necessary aid in time |
| B．kept working as food is the best vaccine |
| C．struggled to keep offering nonstop support |
| D．defeated hunger with support from cooperation |
| A．International community is supposed to underfund WFP. |
| B．The money awarded is adequate for WFP to provide services. |
| C．Problems like hunger call for joint efforts by all the countries. |
| D．Enough attention should be paid to the importance of vaccine. |
8 . “GOING,GOING, GONE, for $3 to bidder No. 43, the lady in the last row, white hat.” The auctioneer (拍卖师） called out my auction number and location. Delighted at my victory, I took the box and gave it a shake. The contents rattled. Inside were dozens -- maybe even hundreds --of buttons, pins, and other items, all glittering in the sunlight. It reminded me of my mom's button box. As a girl, I'd always enjoyed digging through it, just as my own daughters enjoyed looking through mine.
Then I caught sight of an old woman on a swing, watching the happenings in the yard. I went to chat with her. She told me she was selling almost all her possessions because she was moving to a nursing home in town. Her eyes fell to the button box, and when she looked up, they were glistening with tears. Her fist closed around a delicate pearl button, now yellow with age. She smiled as she told me about the birth of her first child and the special pearl-buttoned outfit that would be worn by five more babies before time wore it thin.
I noticed a large, dark brass military button and asked her about it. “From my first husband's uniform,” she said. “It's one of the few things I had to remind me of him when he didn't return home alive." As we went through the box together, I pulled a small key from the box, I heard the sharp intake of her breath. It was the key to a music box that played a special love song, she said. She'd lost it years ago. From my hand to hers, I passed the key to her memories.
Hairpins, wooden nickels, and ruby buttons took her further down memory lane. I knew that when I reached my own home, my heart would pull me to my sewing room, where I would rediscover my own lifetime of memories in my own button box.
1. What do we know about the old woman?| A．She was in need of money. |
| B．She was leaving her house. |
| C．She was wearing a white hat. |
| D．She was selling her mum's button box. |
| A．Discouraging. |
| B．Amusing. |
| C．Touching. |
| D．Shocking. |
| A．A Life in a Button Box |
| B．Memories of My Life |
| C．An Old Lady at a Yard Sale |
| D．My Purchase at an Auction |
9 . Located at a depth of 20 feet below the surface, the sand of the ocean floor off the coast of the Florida Keys might be an unlikely spot to host a music festival, but that hasn’t stopped music enthusiasts from diving underwater to rock out.
For the past 35 years, the Underwater Music Festival, an event that pairs music with conservation, has been hosted. Equipped with guitars, drums and other musical instruments, divers go down to the depths and play along to a playlist of water-inspired songs that are piped underwater via speakers. Over the years the event has gone from being a small grassroots effort put together by few locals, with the idea that once people see what’s going on beneath the surface, the more likely they would be to protect it, to a two-day festival that draws dozens of divers, boaters, and musicians to the Keys from around the world.
“Thirty-five years ago a few Keys locals sat down and wanted to figure out a way to bring awareness to our coral reefs （珊瑚礁）that would preserve, rebuild and restore them in any way,” says Dave Turner, executive director of the Lower Keys Chamber of Commerce. “They came up with this idea of playing music underwater and invited people to listen while also enjoying the local sea life.”
“The preservation of the reef is our main purpose,” Turner says. “To avoid any further damage, the festival takes place in a nearby sandy area so that the musicians don’t disturb the coral when they’re performing.”
Although holding a music festival underwater may seem a bit out there, Turner is quick to point out that it is actually achievable. “The music is obviously not as clear as when you’re sitting in room with stereo （立体音响）but you can still hear it and understand the lyrics and music,” he says. “If you were to go underwater you would recognize the song and it would sound the same. It just has little different tone to it. Plus, sound travels faster and farther underwater.”
1. What is special about the festival?| A．It hardly has any live music. |
| B．It takes place completely underwater. |
| C．It hardly wins support at grassroots level. |
| D．It exhibits all kinds of musical instruments. |
| A．To draw attention to coral reef conservation. |
| B．To raise money for local divers. |
| C．To improve the locals’ life. |
| D．To promote local tourism. |
| A．Attending the festival is an important experience. |
| B．Holding the festival makes some sense. |
| C．The future of the festival is uncertain. |
| D．It is challenging to hold the festival. |
| A．Environment. | B．Health. | C．Education. | D．Science. |
10 . I can remember occasionally nodding off with my phone between my ear and shoulder after hours of conversation with a friend. I’d wake up with the dial tone screaming in my ear. What happened? What did I say? The next day, my friend would tell me a funny story about how I had trailed off（声音逐渐减弱）with some meaningless words and begun snoring（打鼾）into the phone. We had a good laugh, but there was no harm because at least there was no permanent record of it.
For today’s young people, nodding off during a verbal phone call may mean a text written in their sleep. Who even knew texting while sleeping was possible before? But it’s possible today. A newly-published study from Villanova University’s M. Louise Fitzpatrick College of Nursing surveyed 372 college students and found that a quarter of them had sleep texting-texting while in a sleep state at some point. Of that group, 72% had no memory of the event. Respondents most likely to text in the sleep were, unsurprisingly, those who regularly slept with the phone on bed with them.
The study indicated that those who reported sleep texting admitted that cellphone use ravaged their sleep, which meant they suffered poor sleep. The study also found that most college students do not get high quality sleep, and that most do not turn off the cellphone when they go to sleep.
Young adults, especially college students, sleep even less than other age groups, often having only 6 to 7 hours of sleep per night. The demands of heavy class loads and the busy social life of college, combined with little to no adult supervision, have already been an environment fit for sleep disruption. Because of today’s technology of smartphones laptops, and so on, a solid night’s uninterrupted sleep sounds like a faraway dream indeed.
Maybe it’s time for a change.
1. Why did the author trail off with some meaningless words over the phone?| A．Because she wanted to horrify her friend. |
| B．Because she wanted to make up funny story. |
| C．Because she got tired and fell asleep gradually. |
| D．Because she was tired of talking with her friend. |
| A．Texting while sleeping is actually common. |
| B．Today’s young people can’t live without the phone. |
| C．College students often forget what they’ve done. |
| D．College students have a bad habit of texting before going to sleep. |
| A．Protected. | B．Damaged. | C．Improved. | D．Controlled |
| A．College students should stop using their smartphones. |
| B．College students’ class loads should be reduced. |
| C．Having a solid night’s uninterrupted sleep is impossible today. |
| D．College students should avoid using the phone before bedtime. |
