1 . With an abundance of sun and wind, Spain is positioning itself as Europe’s future leader in green hydrogen production to clean up heavy industries. But some energy experts express caution because this process relies on massive availability of zero-carbon electricity.
Green hydrogen is created when renewable energy sources power an electrical current that runs through water, separating its hydrogen and oxygen molecules (分子). The process doesn’t produce planet-warming carbon dioxide, but less than 0.1% of global hydrogen production is currently created in this way.
The separated hydrogen can be used in the production of steel, ammonia (氨) and chemical products, all of which require industrial processes that are harder to stop fossil fuels. Hydrogen also can be used as a transportation fuel, which could one day transform the highly polluting shipping and aviation sectors.
Spain’s large, windswept and thinly populated territory receives more than 2,500 hours of sunshine on average per year, providing ideal conditions for wind and solar energy, and therefore green hydrogen production.
“If you look at where hydrogen is going to be produced in Europe in the next million years, it’s in two countries, Spain and Portugal,” said Thierry Lepercq, the founder and president of HyDeal Ambition, an industry platform bringing together 30 companies. “Hydrogen is the new oil.”
Lepercq is working with companies like Spanish gas pipeline corporation Enagas and global steel giant ArcelorMittal to design an end-to-end model for hydrogen production, distribution and supply at a competitive price. Criticism has centered on green hydrogen’s higher cost compared with highly-polluting “gray hydrogen” drawn from natural gas. Lepercq argues that solar energy produced in Spain is priced low enough to compete.
Globally, Lepercq said, “Electricity is 20% of energy consumption. What about the 80% that is not electrified? ... You need to replace those fossil fuels. Not in 50 years’ time. You need to replace them now.”
1. Why are some experts cautious about green hydrogen production in Spain?| A．It needs large amounts of sun and wind. | B．It has an effect on heavy industries. |
| C．It causes conflicts among countries. | D．It uses lots of zero-carbon electricity. |
| A．Ideal geographical conditions. | B．The support from government. |
| C．Hydrogen production technology. | D．Well-developed public transports. |
| A．It is highly priced. | B．It is easy to store. |
| C．It is competitive. | D．It is highly-polluting. |
| A．Spain manages to use zero-carbon electricity. | B．Spain struggles to lead EU in heavy industry. |
| C．Spain takes the lead in preventing air pollution. | D．Spain replaces fossil fuel with green hydrogen. |
2 . Baby Miloszek was born with a heart defect. His condition is too
Just a week after
Days later, a Polish convenience store called Zabka
“We were very touched by the extremely
| A．particular | B．optimistic | C．serious | D．common |
| A．Undoubtedly | B．Unfortunately | C．Additionally | D．Absolutely |
| A．expect | B．permit | C．ensure | D．afford |
| A．crowded | B．turned | C．brought | D．stepped |
| A．earning | B．declaring | C．battling | D．defeating |
| A．parcel | B．message | C．card | D．list |
| A．sold | B．returned | C．purchased | D．saved |
| A．expected | B．needed | C．accepted | D．commanded |
| A．health | B．dream | C．heart | D．story |
| A．transport | B．provide | C．cover | D．cost |
| A．kindness | B．news | C．sympathy | D．gratitude |
| A．secret | B．reputation | C．money | D．medal |
| A．flexible | B．noble | C．gentle | D．awkward |
| A．recovery | B．request | C．fundraiser | D．award |
| A．contribute | B．present | C．fight | D．change |
3 . I was waiting in a checkout line. A woman and two boys were ahead of me. At the cash desk, a white-haired man had begun to
But today, it was something else. The man didn’t have
Eventually, his
But I had no idea just how
Then I realized all it took to witness this flash of
| A．bag | B．list | C．check | D．receive |
| A．attempt | B．barrier | C．intention | D．mission |
| A．fetch | B．slice | C．weigh | D．taste |
| A．enough | B．pocket | C．extra | D．bonus |
| A．tools | B．items | C．drinks | D．snacks |
| A．doubted | B．glanced | C．shifted | D．paused |
| A．delay | B．evaluation | C．checkup | D．selection |
| A．thrilled | B．anxious | C．embarrassed | D．satisfied |
| A．blew | B．waved | C．cut | D．kicked |
| A．helpless | B．sympathetic | C．patient | D．annoyed |
| A．expensive | B．thrown-away | C．left-behind | D．major |
| A．rushed | B．slipped | C．walked | D．moved |
| A．accomplished | B．failed | C．postponed | D．started |
| A．tenderness | B．courage | C．kindness | D．tolerance |
| A．careful | B．heavy | C．clumsy | D．light |
4 . Public health data signals a genuine crisis in adolescent mental health: rising rates of anxiety, depression, and hopelessness. But as we worry about tweens and teens who are struggling, we can’t ignore another mounting effect — the burdens that are shouldered by their friends and peers in an “always on” world.
We have studied teens and tech for over a decade. Their networks are ever-expanding, in no small part because there’s a sense that being nice means accepting fellow requests from acquaintances and friends-of-friends. And it’s not just staying connected — it’s keeping up with what others post, too.
Social media platforms thus make it technically possible to maintain more relationships than we are historically actually wired to track and manage. The result is an overwhelming wave of social information. It’s especially intense for adolescents whose developmental sensitivities drive them to care deeply about what their peers are doing and thinking.
Significant stress comes with trying to be a “good friend” in the age of social media. Friendship requires both public and behind-the-scenes support. Even before a social media post is made public, close friends can be pulled into photo selection, editing, and final examination. Besides, they need to respond in the right way and in the right amount of time, which differs from one relationship to another. Replying too quickly can be seen as over-eager, especially when the friendship is new or not close. But when it’s a close friend, too long a lag (延迟) can be hurtful.
The qualities that are key to building or breaking friendships are actually the same as they’ve always been: mutual (相互的) sharing of joys and sorrows, a give and take of acceptance and support, and an ability to weather and resolve conflicts. But technologies have transformed how friendships play out. Social media increases the burdens that come along with being a good friend. Too often, these dynamics hit teens hard in ways that are lost on adults. And that is what should be changed with the help of parents, schools and other parts of society.
1. What makes teenagers’ networks continue to expand?| A．The pressure to be nice. | B．The requests of their parents. |
| C．The need to meet more people. | D．The burden of living independently. |
| A．Exciting. | B．Challenging. | C．Money-saving. | D．Risk-taking. |
| A．The qualities of being a teen friend. |
| B．The conflicts between schools and parents. |
| C．The relations between parents and their teens. |
| D．The influences of social media on teen friendship. |
| A．Why more teens are addicted to social media |
| B．How teens nowadays gain long-standing friendships |
| C．How social media has made teen friendships more stressful |
| D．What makes teens become more sensitive to their peers’ needs |
5 . In May 1987 the Golden Gate Bridge had a 50th birthday party. The bridge was closed to motor traffic so people could enjoy a walk across it. Organizers expected perhaps 50,000 people to show up. Instead, as many as 800, 000 crowded the roads to the bridge. By the time 250,000 were on the bridge, engineers noticed something terrible：the roadway was flattening under what turned out to be the heaviest load it had ever been asked to carry. Worse, it was beginning to sway（晃动）. The authorities closed access to the bridge and tens of thousands of people made their way back to land. A disaster was avoided.
The story is one of scores in To Forgive Design：Understanding Failure, a book that is at once a love letter to engineering and a paean（赞歌）to its breakdowns. Its author, Dr. Henry Petroski, has long been writing about disasters. In this book, he includes the loss of the space shuttles（航天飞机）Challenger and Columbia, and the sinking of the Titanic.
Though he acknowledges that engineering works can fail because the person who thought them up or engineered them simply got things wrong, in this book Dr. Petroski widens his view to consider the larger context in which such failures occur. Sometimes devices fail because a good design is constructed with low quality materials incompetently applied. Or perhaps a design works so well it is adopted elsewhere again and again, with seemingly harmless improvements, until, suddenly, it does not work at all anymore.
Readers will encounter not only stories they have heard before, but some new stories and a moving discussion of the responsibility of the engineer to the public and the ways young engineers can be helped to grasp them.
"Success is success but that is all that it is," Dr. Petroski writes. It is failure that brings improvement.
1. What happened to the Golden Gate Bridge on its 50th birthday?| A．It carried more weight than it could. |
| B．It swayed violently in a strong wind |
| C．Its roadway was damaged by vehicles |
| D．Its access was blocked by many people. |
| A．No design is well received everywhere |
| B．Construction is more important than design. |
| C．Not all disasters are caused by engineering design |
| D．Improvements on engineering works are necessary. |
| A．Failure can lead to progress. | B．Success results in overconfidence |
| C．Failure should be avoided. | D．Success comes from joint efforts. |
| A．A news report | B．A short story. |
| C．A book review | D．A research article. |
6 . Kristin Schell is the founder of The Turquoise Table, a movement of ordinary people who want to create community right in their own front yards. Ten years ago, she and her family moved to a new home in Austin, Texas.
One day, Kristin tried to connect with her new neighbors by hosting a party. She bought a few picnic tables but the delivery driver set one table down in her front yard by mistake. “After the party, I painted the table turquoise—my favorite color—and put it in the front yard, just a few feet from the sidewalk,” she says.
That turquoise table became the place where Kristin and her kids hung out. They played games, did crafts and ate snacks. “We got intentional about where we spent our time,” Kristin says. “We became ‘front yard people’.”
Neighbors began to stop by to introduce themselves and sit down for a chat. Kristin invited people to join her at the table for coffee or iced tea. Then neighbors asked Kristin if their family could put a picnic table in their front yard too. A movement was born. “It was a simple way to slow down and connect with others,” she says. The turquoise table was inviting and had a shared feel.
People often hesitate to invite others into their homes. They think their house is too messy, it’s not big enough or they don’t have enough time. “Our perfectionism can cause us to miss out on the joy of connecting with others,” Kristin says. Her picnic table takes away the excuses—and the pressure.
She likes how it enables her to take a small step toward easing loneliness and building relationships in her community. “People’s greatest need is to know that they are loved and that they belong,” she says.
A decade after their Texas beginnings, thousands of Turquoise Tables exist in all 50 states and in 13 countries around the world. Not all of them are actually turquoise. “No matter what color it is, it’s a friendship table,” Kristin says.
1. Why did Kristin Schell start the movement?| A．To host more parties in her front yard. | B．To entertain her friends and neighbors. |
| C．To engage with people in the neighbourhood. | D．To create harmonious communities worldwide. |
| A．Creative and sociable. | B．Friendly and humorous. |
| C．Generous and ambitious. | D．Cautious and responsible. |
| A．People don’t like others to step into their houses. |
| B．The campaign has a big impact at home and abroad. |
| C．Kristin Schell bought the turquoise table to host a party. |
| D．People feel unwilling to join in the front ya rd chat at first. |
| A．Love Your Neighbors | B．An Amazing Woman |
| C．Happy Front Yard Time | D．Tables Where All Are Welcome |
7 . Online courses offer people abundant opportunities to learn. Try some of the Harvard online courses about humanities.
The Path to Happiness
From Confucianism to Daoism, the philosophies developed over two thousand years ago are among the most powerful in human history. This course brings voices from the past into modern contexts to explore the path to a good life today.
Duration: June 16, 2021—June 14, 2022
Fees: Free of charge
Pace: Self-paced
Difficulty: Introductory
Introduction to the Ancient Greek World
This course is about ancient Greece with its unique places, ways of life and historical changes. We survey the most important social institutions and cultural traditions. We also study everyday features such as food and dress.
Duration: June 21—August 6, 2021
Fees: $3400
Pace: Instructor-led
Difficulty: Introductory
Biotechnology and the Human Good
Biotechnology offers exciting and promising prospects for healing the sick and relieving the suffering. In this course we consider possible functions beyond common treatments like making people look younger, perform better and become perfect.
Duration: June 21—August 6, 2021
Fees: $ 3400
Pace: Instructor-led
Difficulty: Intermediate
Superheroes and Power
What makes superheroes popular? How can they help us think about super powers? In this course, we explore those questions in Marvel and DC favorites (especially the X-Men) as well as independent comics novels.
Duration: June 22 —August 6, 2021
Fees: $ 3400
Pace: Instructor-led
Difficulty: Intermediate
1. Which course can you take if you are free in Oct. 2021?| A．The Path to Happiness | B．Introduction to the Ancient Greek World |
| C．Biotechnology and the Human Good | D．Superheroes and Power |
| A．Powers of superheroes. | B．More uses of biotech. |
| C．Ways to increase happiness. | D．Clinical practices of biotech. |
| A．They are of the same level. | B．They are free of charge. |
| C．They belong to the same subject. | D．They are instructor-led. |
8 . Pacific Science Center Guide
◆Visit Pacific Science Center’s Store
Don’t forget to stop by Pacific Science Center’s Store while you are here to pick up a wonderful science activity or souvenir to remember your visit. The store is located(位于) upstairs in Building 3 right next to the Laser Dome.
◆Hungry
Our exhibits will feed your mind, but what about your body? Our café offers a complete menu of lunch and snack options, in addition to seasonal specials. The café is located upstairs in Building 1 and is open daily until one hour before Pacific Science Center closes.
◆Rental Information
Lockers are available to store any belongings during your visit. The lockers are located in Building 1 near the Information Desk and in Building 3. Pushchairs and wheelchairs are available to rent at the Information Desk and Denny Way entrance. ID required.
◆Support Pacific Science Center
Since 1962, Pacific Science Center has been inspiring a passion(热情) for discovery and lifelong learning in science, math and technology. Today, Pacific Science Center serves more than 1.3 million people a year and brings inquiry-based science education to classrooms and community events all over Washington State. It’s an amazing accomplishment and one we cannot achieve without generous support from individuals, corporations, and other social organizations. Visit pacificsciencecenter.org to find various ways you can support Pacific Science Center.
1. Where can you buy a souvenir at Pacific Science Center?| A．In Building 1. |
| B．In Building 3. |
| C．At the the Laser Dome. |
| D．At the Denny Way entrance. |
| A．Train Science teachers. |
| B．Distribute science books. |
| C．Inspire scientific research. |
| D．Take science to the classroom. |
| A．To encourage donations. |
| B．To advertise coming events. |
| C．To introduce special exhibits. |
| D．To tell about the Center’s history. |
9 . Do you ever hear a friend speak on a topic with the belief that “everyone”thinks the same way? Do you often find yourself surrounded in a social media feed that is completely tailored to you and your beliefs, reading along without the immediate realization?
A social media echo chamber (回声壁) is when one experiences a tailored media experience that leave out opposing viewpoints and differing voices. Social media sites like Facebook, Twitter, and YouTube connect groups of like-minded users together based on shared content preferences. As a result, people see and take in information according to our preexisting beliefs and opinions. Social media companies therefore rely on algorithms (算法) to assess our interests and flood us with information that will keep our attention. The algorithms focus on what we “like”, and “share” to keep feeding content that makes us comfortable.
In order to truly get access to all information and to evaluate our media, we must give ourselves the opportunity to step out of our comfort zone. While this becomes increasingly challenging, there are things we can do. The first step is to beef up your media consumption sources. Adding in a few media sources with differing opinions will allow you to at least understand what people are saying outside of your echo chamber. Next, read each thing you see with a critical eye. Make sure that each thing you accept as truth is truly fact. Lastly, attempt to search out reliable new sources that are known for trying their best to leave out false information. By accepting that our media buffet on social media is a product of our present beliefs and opinions, we can work to make sure we are not simply stuck in a social media echo chamber.
1. What is a result of the social media echo chamber?| A．People contact like-minded online users effectively. |
| B．People keep reading for more differing viewpoints. |
| C．People rely on algorithms to evaluate their interests. |
| D．People only get information confirming their beliefs. |
| A．Track. | B．Improve. |
| C．Provide. | D．Identify. |
| A．Criticizing fake news on social media. |
| B．Exposing ourselves to opposing voices. |
| C．Researching primary sources of information. |
| D．Accepting our present beliefs and opinions. |
| A．To call on people to use algorithms frequently. |
| B．To ask people not to take in information blindly. |
| C．To promote the use of various social media sites. |
| D．To inform people of new technology developments. |
10 . It’s unlikely that we’ll see a dodo, a flightless bird, walking this earth anytime again, according to Beth Shapiro, a evolutionary molecular biologist.
“When most people think about de-extinction, they’re imagining cloning,” Shapiro said. Cloning, the approach that created Dolly, the sheep in 1996 and Elizabeth Ann, the black-footed ferret in 2020, creates an identical genetic copy of an individual by putting DNA from a living adult cell into an egg cell from which the nucleus (细胞核) has been removed. Adult cells contain all the DNA needed to develop into a living animal. Egg cells then use that DNA as a blueprint to turn themselves into many kinds of cells——skin, organs, blood and bones——the animal needs.
“But no living cells from dodos exist. Instead,” Shapiro said, “you’d have to start with a closely related animal’s genome (基因组) and then change it into one similar to dodos.” For example， mammoths (猛犸) are also extinct，but they were very closely related to modern Asian elephants, so researchers are attempting to bring mammoths back from extinction by creating a hybrid mammoth with some mammoth genes replacing part of the elephant genome in an elephant egg cell. However, there are likely millions of genetic differences between the genome of an Asian elephant and that of a mammoth according to Shapiro.
As for the dodo, its closest living relative is the Nicobar pigeon. Mammoths and Asian elephants are pretty closely related, whereas it had been more than 20 million years since the dodo and the Nicobar pigeon had any common ancestors. Genetic differences between the two bird species are therefore much greater, making it a formidable task to create a successful hybrid in the lab, Shapiro said.
Even if scientists manage to bring dodos back, the island where they once lived is a very different place nowadays, which make it impossible to reintroduce dodos without major intervention.
1. What is Paragraph 2 mainly about?| A．The special role of DNA. |
| B．The process of cloning. |
| C．The development of cloning. |
| D．The complexity of cloning. |
| A．Dodos are harder to bring back to life. |
| B．Their living cells are hard to preserve. |
| C．Cloning can be used to recreate extinct animals. |
| D．They share a similar genome with Asian elephants. |
| A．Urgent. |
| B．Possible. |
| C．Tough. |
| D．Different. |
| A．Favorable. |
| B．Intolerant. |
| C．Objective. |
| D．Negative. |
