2 . With over 4.1 billion people, or around 55 percent of the world’s population, living in urban areas, cities and towns worldwide are getting increasingly jammed. In addition to spending hours stuck in traffic, residents are also exposed to high air pollution levels caused by transportation emissions(排放). Now, Saudi Arabia hopes to overturn urban living with “The Line”—a futuristic city designed around nature, without cars, roads and crowded places!
The totally different city, announced on January 10, 2021, is the brainchild of Saudi Crown Prince(王储)Mohammed bin Salman(MBS).Located in Neom, a 10, 000-square-mile high-tech planned development on the Red Sea coast. The Line will be the base of MBS’s Saudi Vision 2030. The strategic plan aims to diversify Saudi Arabia’s oil-dependent economy into other fields, like tourism, and create exciting job opportunities for its citizens.
The 105-mile-long city, expected to cost between $100 billion and $200 billion, will be built along a straight line and comprise several self-sustaining communities. To ensure all services are within a short, five-minute walk, each community will feature a three-layer infrastructure(基础设施)．
There will be no cars or roads on the top “pedestrian layer”, so residents can freely walk and bike in the surrounding green spaces. The second “service layer”, will include all essential daily services, such as schools, medical clinics, leisure facilities, and grocery stores. The third “spine layer” will house ultra-high-speed transportation and autonomous vehicles transporting residents across communities in less than 20 minutes. The entire city will be powered with renewable clean energy sources such as solar and wind, and possibly even hydrogen．
If all goes according to the plan, construction of this groundbreaking, complex infrastructure project will start before the end of 2021. In addition to providing up to a million residents with a clean and stress-free living environment, the Line is expected to create 380, 000 new jobs, promote economic diversification, and contribute a shocking $48 billion to Saudi Arabia’s Gross Domestic Product(GDP)by 2030. More importantly, MBS believes it will provide governments worldwide a blueprint for how people and planet can co-exist in harmony.
1. Where can you purchase a bike if living in The Line?| A．Pedestrian layer. | B．Service layer. |
| C．Spine layer. | D．The green spaces. |
| A．Widely-accepted. | B．Ill-considered. |
| C．Risk-taking. | D．Mind-blowing. |
| A．To facilitate Saudi economic diversification. |
| B．To offer a model for nature-man integration. |
| C．To boost the government’s finances. |
| D．To create more job opportunities. |
| A．Saudi Vision for Environmental Protection |
| B．The Construction of The Line Is Underway |
| C．MBS：An Influential Leader of Saudi Arabia |
| D．MBS’ Vision of a Futuristic Zero Carbon City |
3 . Japan's biggest airline is betting that the future of travel isn't traveling at all. For the last month, a married couple has been interacting with a robot—called an Avatar—that's controlled by their daughter hundreds of miles away. Made by ANA Holdings Inc., it looks like a vacuum cleaner with an iPad attached. But the screen displays the daughter's face as they chat, and its wheels let her move about the house as though she's really there.
“Virtual travel” is nothing new,of course.Storytellers, travel writers and artists have been stimulating the senses of armchair tourists for centuries. It's only in recent decades that frequent, safe travel has become available to the non- wealthy.
Yet even as the world's middle classes climb out of the armchair and into economy-class seat, there are signs of a post-travel society emerging. Concerns about environmental sustainability cause loss to airlines which release much carbon. And the aging of abundant societies is both restricting physical travel and creating demand for alternative ways to experience the world. For the travel industry, virtual reality offers an attractive response to these trends.
Of course, new technologies encourage far-out claims. ANA doesn't plan to start selling Avatars until next year. Profits, too, will probably be difficult to make: By one estimate, the global market for this kind of technology will be worth only about $300 million by 2023. By contrast, ANA's traditional travel business brought in more than $19 billion last year.
But if the business value for virtual vacations is still weak, the market for technologies that bridge physical distances between families and coworkers seems likely to only expand. ANA's robots may not replace its airplanes any time soon, but they ll almost certainly be a part of travel's high-tech future.
1. Why does the author use the example of a couple interacting with a robot?| A．To show the Japanese are crazy about travel. |
| B．To indicate virtual travel begins to enter people's real life. |
| C．To show the couple are very enthusiastic over robots. |
| D．To express the close relationship between the couple and their daughter. |
| A．Storytellers, travel writers and artists have been using it for centuries. |
| B．Frequent and safe travel has become available to the ordinary people. |
| C．People are worried about the air pollution caused by airlines. |
| D．More and more people lose interest in travel. |
| A．They will be put on the market soon. |
| B．They will bring ANA a lot of money, |
| C．They will replace ANA's airplanes soon. |
| D．They are almost unavoidable in travel's future. |
| A．Your Next Travel May Be Virtual |
| B．Easy Travel in the Future |
| C．Virtual Travel Benefits |
| D．Air Travel Disappearing |
4 . In 2015, a man named Nigel Richards memorized 386, 000 words in the entire French Scrabble Dictionary in just nine weeks. However, he does not speak French. Richards’ impressive feat is a useful example to show how artificial intelligence works — real AI. Both of Richard and AI take in massive amounts of data to achieve goals with unlimited memory and superman accuracy in a certain field.
The potential applications for AI are extremely exciting. Because AI can outperform humans at routine tasks — provided the task is in one field with a lot of data — it is technically capable of replacing hundreds of millions of white and blue collar jobs in the next 15 years or so.
But not every job will be replaced by AI. In fact, four types of jobs are not at risk at all. First, there are creative jobs. AI needs to be given a goal to optimize. It cannot invent, like scientists, novelists and artists can. Second, the complex, strategic jobs — executives, diplomats, economists — go well beyond the AI limitation of single-field and Big Data. Then there are the as-yet-unknown jobs that will be created by AI.
Are you worried that these three types of jobs won’t employ as many people as AI will replace? Not to worry, as the fourth type is much larger: jobs where emotions are needed, such as teachers, nannies and doctors. These jobs require compassion, trust and sympathy — which AI does not have. And even if AI tried to fake it, nobody would want a robot telling them they have cancer, or a robot to babysit their children.
So there will still be jobs in the age of AI. The key then must be retraining the workforce so people can do them. This must be the responsibility not just of the government, which can provide funds, but also of corporations and those who benefit most.
1. What is the main purpose of paragraph 1?| A．To introduce the topic. |
| B．To mention Nigel’s feat. |
| C．To stress the importance of good memory. |
| D．To suggest humans go beyond AI in memory. |
| A．Be superior to | B．Be equal to |
| C．Be similar to | D．Be related to |
| A．The writer. | B．The shop assistant. |
| C．The babysitter. | D．The psychologist. |
| A．Limit the application of AI to a certain degree. |
| B．Get more support from the government. |
| C．Apply for the donation from companies. |
| D．Upgrade themselves all the time. |
5 . A freshly baked roll is as delightful as a soft，light cloud on a summer's day.What gives bread much of its appealing texture is gluten，a group of proteins found in wheat.But in people with celiac disease(乳糜泻)，gluten damages the small intestine(肠).Many others may have milder gluten intolerance and avoid foods that contain it.
Most gluten-free bread is made from alternative flours such as rice or potato，so it tastes and feels different from wheat bread.Now，however，researchers say that they have found a way to genetically engineer wheat that contains far less of the most troublesome type of gluten—but still has other proteins that give bread its characteristic taste and springiness.
Genetically modified crops are the subject of fierce debate around the world.The biggest concern involves the practice of inserting DNA from one species into another，says Francisco Barro，a plant biotechnologist.To avoid this genetic crossover，Barro and his colleagues used the gene-editing technique CRISPR／Cas9 to cut selected genes from a wheat genome(基因组).
Their study zeroed in on alpha-gliadins(α-胶质蛋白)，gluten proteins believed to be wheat’s major troublemakers in the immune system.The researchers designed bits of genetic material that directed the scissor-like Cas9 protein to cut out 35 of the 45 alpha—gliadin genes.When the modified wheat was tested in a Petri dish，it produced an 85 percent weaker immune response，the team reported online last September in Plant Biotechnology Journal.
Wendy Harwood，a crop geneticist at the John Innes Center in England，who was not part of the study，notes that the engineered wheat has a long way to go before it can be turned into anything marketable.“I don’t think it's the end of the story.”she says.“This is just a really important step in maybe producing something that is going to be incredibly useful.”To develop a completely safe strain of wheat for celiac patients，the researchers may need to target more of the gluten genes.Barro says his team is working on that.
1. What’s the text mainly about?| A．Making gluten—free bread. |
| B．Advantages of gluten-free wheat. |
| C．Debate about genetically modified crops. |
| D．Developing genetically engineered wheat. |
| A．To advertise a new study. |
| B．To raise the topic to be written about. |
| C．To provide some advice for the readers. |
| D．To popularize some information about medicine. |
| A．Genetic crossover. | B．Gene-editing technique. |
| C．The practice of using DNA. | D．The subject of fierce debate. |
| A．A little alarmed. | B．Mildly surprised. |
| C．Somewhat opposed. | D．Cautiously optimistic. |
