1 . It was once common to regard Britain as a society with class distinction. Each class had unique characteristics.
In recent years, many writers have begun to speak the ‘decline of class’ and ‘classless society’ in Britain. And in modern day consumer society everyone is considered to be middle class. But pronouncing the death of class is too early. A recent wide-ranging society of public opinion found 90 percent of people still placing themselves in particular class; 73 percent agreed that class was still a vital part of British society; and 52 percent thought there were still sharp class differences. Thus, class may not be culturally and politically obvious, yet it remains an important part of British society. Britain seems to have a love of stratification.
One unchanging aspect of a British person’s class position is accent. The words a person speaks tell her or his class. A study of British accents during 1970s found that a voice sounding like a BBC newsreader was viewed as the most attractive voice. Most people said this accent sounded ‘educated’ and ‘soft’. The accents placed at the bottom in this study, on the other hand, were regional (地区的) city accents. These accents were seen as ‘common’ and ‘ugly’. However, a similar study of British accents in the US turned these results upside down and placed some regional accents as the most attractive and BBC English as the least. This suggests that British attitudes towards accent have deep roots and are based on class prejudice.
In recent years, however, young upper middle-class people in London, have begun to adopt some regional accents, in order to hide their class origins. This is an indication of class becoming unnoticed. However, the 1995 pop song ‘Common People’ puts forward the view that though a middle-class person may ‘want to live like common people’ they can never appreciate the reality of a working-class life.
1. A recent study of public opinion shows that in modern Britain ________.| A．it is time to end class distinction. |
| B．most people belong to middle class. |
| C．it is easy to recognize a person’s class. |
| D．people regard themselves socially different. |
| A．variety | B．division | C．authority | D．qualification |
| A．original | B．educated | C．prejudiced | D．unattractive. |
| A．The middle class is expanding. |
| B．A person’s accent reflects his class. |
| C．Class is a key part of British society. |
| D．Each class has unique characteristics. |
2 . American cities are similar to other cities around the world: In every country, cities reflect the values of the culture. American cities are changing, just as American society is changing.
After World War Ⅱ, the population of most large American cities decreased; however, the population in many Sun Belt cities increased. Los Angeles and Houston are cities where population shifts(转移) to and from the city reflect the changing values of American society. In the late 1940s and early 1950s, city residents(居民) became richer. They had more children so they needed more space. They moved out of their apartments in the city to buy their own homes. They bought houses in the suburbs(郊区).
Now things are changing. The children of the people who left the cities in the 1950s are now adults. Many, unlike their parents, want to live in the cities. They continue to move to Sun Belt cities and older ones of the Northeast and Midwest. Many young professionals(专业人士，专门人才) are moving back into the city. They prefer the city to the suburbs because their jobs are there; or they just enjoy the excitement and possibilities that the city offers.
This population shift is bringing problems as well as benefits. A large number of poor people must leave their apartments in the city because the owners want to sell the buildings or make apartments for sale instead of for rent. In the 1950s, many poor people did not have enough money to move to the suburbs; now many of these same people do not have enough money to stay in the cities.
Only a few years ago, people thought that the older American cities were dying. Some city residents now see a bright, new future. Others see only problems and conflicts. One thing is sure: many dying cities are alive again.
1. What does the author think of cities all over the world?| A．They are alive. | B．They are hopeless. |
| C．They are similar. | D．They are different. |
| A．Because older American cities were dying. |
| B．Because they were richer and needed more space. |
| C．Because cities had the worst parts of society. |
| D．Because they could hardly afford a life in the city. |
| A．are faced with housing problems |
| B．are forced to move to the suburbs |
| C．want to sell their buildings |
| D．need more money for daily expenses |
| A．American cities are changing for the worse |
| B．people have different views on American cities |
| C．many people are now moving from American cities |
| D．the population is decreasing in older American cities |
3 . Fancy a holiday to the moon? Sounds crazy? Not really. A Japanese company has been working on how to organize holidays to the moon for several years now.
Trying to make the holiday possible will not be an easy task, and the Japanese company plans to make it in stages.
The next stage is to build a big hotel orbiting 500 km above the earth. The hotel will orbit the earth once every four or five hours, which will offer visitors some fascinating views of the earth.
The final stage in the plan is the construction of a hotel on the surface of the moon itself. As solar energy would be used to provide power, it would be important to build the hotel near one of the poles of the moon in order to gather as much solar energy as possible.
So perhaps in a few years you might be enjoying yourselves on the moon.
| A．Next, the hotel will have a wide range of sporting activities. |
| B．Tourists who want to travel into space can stay at a big hotel. |
| C．The first thing to do is to organize trips around the earth for a few hours. |
| D．There would probably be holidays to a moon hotel within the next ten years. |
| E．There is plenty of sand, but the big problem will come with producing water. |
| F．This part of the development plan does not seem to be too difficult to carry out. |
| G．This is because a lunar day, which is 14 earth days long, is followed by 14 days of darkness. |
4 . Is there anybody out there? For centuries humans have wondered although the ways in which we have gone about this have varied. As we have gained a greater understanding of the universe, our searches have taken on more concrete(具体的) forms. Questions about aliens(外星人) have become a subject for science rather than science fiction.
Now new cooperation between the Very Large Array (VLA) observatory in New Mexico and the SETI Institute in California means that our curiosity about whether aliens exist can be closer than ever before to being satisfied. Data from the VLA’S 28 radio telescopes, used to scan a vast area of sky, will be fed through a special supercomputer that will search for distant signals.
How likely it is that a signal will be found, and what this might mean, are hard questions to answer. SETI’s existing projects have not discovered any signals from other planets so far. But recent discoveries in space and Earth sciences have provided some encouragement for those who are enthusiastic about the possibility, however remote, of detecting other civilizations.
Once it was thought that our solar system could be unique. Since the discovery of the first exoplanet (a planet beyond the solar system) in the 1990s, thousands more have been located. Around one in five stars is now thought to have a planet in their orbit(运行轨道) in a so-called “habitable(适合居住的) zone”—that is, at a distance from the star where the temperature means that life is theoretically possible.
Are Earth’s 7.5 billion humans, along with billions of other animals and plants they share their home with, on their own in the universe? If there is another life form somewhere, could it be as intelligent as humans? Or could it threaten them? I think all of these need further exploration. As explorations of Mars continue, and a new set of observations from the James Webb Space Telescope are set to begin, our interest in the possibility of alien life appears as much as before.
1. Why does the VLA work with SETI?| A．To develop new radio telescopes | B．To find evidence of aliens’ existence |
| C．To build a special supercomputer | D．To search for distant signals |
| A．Life does indeed exist on exoplanets |
| B．New technologies are employed to find aliens |
| C．Some exoplanets may have habitable zones |
| D．Signals have been discovered from other planets |
| A．Uncertain | B．Positive | C．Unacceptable | D．Worried |
| A．Space: the unknown place | B．Finding aliens: possible or not? |
| C．Receiving signals: aliens appear again? | D．Exoplanets: home of aliens |
5 . You’ve heard the predictions from some of the brightest minds about AI’s influence. Tesla and SpaceX’s chief Elon Musk worries that AI is far more dangerous than nuclear weapons. The late scientist Stephen Hawking warned that AI could serve as the “worst event in the history of our civilization” unless humanity is prepared for its possible risks.
But many experts, even those who are aware of such risks, have a more positive attitude, especially in health-care and possibly in education. That is one of the results from a new AI study released Monday by the Pew Research Centre.
Pew canvassed the opinions of 979 experts over the summer, a group that included famous technologists, developers, innovators, business and policy leaders. The interviewed experts, some of whom chose to remain anonymous, were asked to join in the discussion of a serious and important question: “By 2030, do you think it is most likely that advancing AI and related technology systems will improve human capacities and control them?”
Nearly two-thirds of experts predicted most of us will be mostly better off. But a third thought otherwise, and a majority of the experts expressed at least some concerns over the long-term impact of AI on the “essential elements of being human”. Among those concerns were data abuse, loss of jobs and loss of control brought by autonomous weapons and cybercrime. Above all, by taking data in and spitting answers out, those “black box” tools make decisions in digital systems. It is an erosion in our ability to think for ourselves.
1. Why is Stephen Hawking mentioned in the first paragraph?| A．To warn humans to give up AI as soon as possible. |
| B．To remind readers that a new AI age has come into view. |
| C．To prove great scientists care much about the future of AI. |
| D．To introduce the main idea of the text that AI benefits the future. |
| A．Most experts are certain that AI will be out of control. |
| B．Pew asked experts from different fields for opinions. |
| C．Pew concludes that humans will suffer from AI. |
| D．33% of experts think AI will have little impact on humans. |
| A．Because they make decisions in digital systems. |
| B．Because they can take data in and spit answers out. |
| C．Because they may weaken our ability to think independently. |
| D．Because they may decrease humans’ welfare in the long term. |
| A．Experts’ concern about AI. | B．Humans’ being controlled by AI. |
| C．Experts’ Expectation of AI. | D．AI’s influence on society. |
The 2020 Nobel Prize in Chemistry
Gene editing has a wide
One of the most convenient methods of gene editing is called CRISPR/Cas9,
In simple words, CRISPR/Cas9 is the “scissors” of genes. The greatness of CRISPR/Cas9 lies in extreme accuracy. It also enables humans to breed (孕有) more plant varieties and develop better treatment of cancer.
In the future, the discovery
There will be no traditional Nobel Awarding Ceremony in Stockholm this year due to the COVID-19,
7 . What if we had the power to control time, instead of moving from the past to the present to the future? What if we could jump, loop and travel through time in a machine? What if we could go wherever and whenever we pleased?
This ability would allow us to witness historic wonders, change decisions and see people from the past. We could right wrongs and stop wars from starting.
The mysterious puzzle of time has kept people debating its nature for hundreds of years. Science fiction writers have turned it into imaginative stories. Some scientists have even attempted to explain it using math. This math tries to make the dream of time travel come true.
The scientist Albert Einstein said that time and space are one thing. He called it “spacetime.” Einstein said that there are three dimensions in space: height, width and depth. A scientist named Hermann Minkowski added time as a fourth dimension.
Einstein introduced two ideas that have led to theories about the possibility of time travel. The first is relativity. The idea of relativity is that the force of gravity causes space to bend, which causes time to twist. The second idea focuses on special relativity. The idea is that a traveler moving super-fast through flat spacetime will enter the future. Einstein considered time “relative” because it is measured based on where we are on Earth or in space.
Stephen Hawking is a famous scientist. He believes that a time machine will never be built. If it were possible, he thinks we would already know. If a time machine could be built, how come no one from the future has invaded us?
The first science fiction story with this theme is The Clock That Went Backward by Edward P. Mitchell, which was published in 1881. Since then, thousands of books, films and television shows have explored the idea of time travel, in which some tools such as phones, watches, photographs and old books take travelers backward and forward.
Will time travel ever happen? Who knows? Most important is to keep your eyes open and have a sense of wonder.
1. What is the author’s purpose of writing the first paragraph?| A．To show time and space are connected. |
| B．To show people’s interest in time travel. |
| C．To draw readers’ attention to time travel. |
| D．To make people believe time travel is possible. |
| A．Time travel is possible in the future. |
| B．People can’t move faster than light. |
| C．Time travel is against scientific rules. |
| D．Spacetime is not a real thing in theory. |
| A．The first science fiction story. |
| B．Some tools used in time travel. |
| C．Edward P. Mitchell, the pioneer. |
| D．Different works about time travel. |
| A．cautious. | B．pessimistic |
| C．sceptical | D．optimistic. |
8 . These days, it seems like everyone wants to go out into space and live on new planets.Rather than depend on another pre-existing planet, could we make a new, proper planet ourselves?
To start with, if we do want to be living on it, we should find a good place in space to put the new planet. We’d want it to be in a habitable zone, meaning the planet should be at the right distance from its star to make sure there would be perfect temperatures and most importantly, liquid(液态的) water.
We’d also need the right materials to make the planet. Our Earth is made up of many different elements(元素). If we made our own new planet we’d probably want it to have similar elements and a similar structure(结构) We’ d also want enough water to form some oceans.
But even if we get all of the materials creating a new planet like Earth could have many troubles. It might be something more like a huge space station. It would be pretty expensive if we wanted it to be super big.
We would probably also need a lot of food since there s going to be many scientists and astronauts out in space working on this project!
According to NASA, each astronaut uses about 0. 83 kilograms of food per meal, including 0.12 kilograms of packaging(包装) material. Without the weight of the packaging material, we’d need about 780 kilograms of food just to feed one astronaut for a year.
Putting all these together could make it possible to make our own planet one day! In reality, creating a new planet would probably require a very modern technology and there would be tons of other things to think about. And if this is even possible, it likely won’t happen for a very long time.
1. What's the first thing we should do if we want to create a new planet?| A．To prepare enough food. |
| B．To design its inner structure. |
| C．To find a proper place to set the planet. |
| D．To collect materials similar to our Earth. |
| A．Our Earth. | B．Outer space. |
| C．The new planet. | D．The ocean water. |
| A．About 0. 12 kilograms. | B．About 0. 71 kilograms. |
| C．About 0. 83 kilograms. | D．About 0.95 kilograms. |
| A．It is a waste of money and time. | B．It should be one of NASA’S next plans. |
| C．It is not a good idea for humans. | D．It won’t come true in the near future |
9 . Let us suppose it is now about A.D. 2060. Let’s make believe (假设；虚构) it is about sixty years from now. Of course, things have changed and life is very different.
Voyages to the moon are being made every day. It is as easy to take a holiday on the moon today as it was for the people in 1960 to take a holiday in Europe. At a number of scenic spots on the moon, many hotels have been built. The hotels are air-conditioned, naturally. In order that everyone can enjoy the beautiful scenery on the moon, every room has at least one picture window. Everything imaginable is provided for entertainment (娱乐) of young and old.
What are people eating now? People are still eating food. They haven’t yet started to take on heir (继承) supply of energy directly as electrical current or as nuclear power. They may some day. But many foods now come in pill form, and the food that goes into the pill continues to come mainly from green plants.
Since there are several times as many people in the world today as there were a hundred years ago, most of our planet’s surface has to be filled. The deserts are irrigated with water and crops are no longer destroyed by pests. The harvest is always good.
Farming, of course, is very highly developed. Very few people have to work on the farm. It is possible to run the farm by just pushing a few buttons now and then.
People are now largely vegetarians (素食者). You see, as the number of people increases, the number of animals decreases. Therefore, the people have to be vegetarians and we are healthier both in our bodies and in our minds, and we know the causes and cure of disease and pain, and it is possible to get rid of diseases. No one has to be ill any more.
Such would be our life in 2060.
1. According to the passage, what will be on the moon in about A.D. 2060?| A．Many tourists. | B．Many other animals. |
| C．Many plants. | D．A sea. |
| A．Biscuits in pill form. | B．Foods in pill form. |
| C．Foods in water form. | D．Foods in gas form. |
| A．there are fewer population | B．there are more pests |
| C．there is less water | D．the crops are getting better |
| A．Because they don’t eat meat. |
| B．Because doctors advise them not to eat meat. |
| C．Because the number of animals decreases. |
| D．Because all the animals have died of diseases. |
