1 . China's historic 23-day Chang'e 5 mission has not only obtained precious rock and soil samples from the moon, but has also brought back a group of seeds that traveled the furthest in the nation's agricultural and forestry histories. More than 30 kinds of seeds, including that of rice, oats etc., were placed inside the multi-module Chang'e 5 spacecraft and orbited around the moon for about 15 days.
Scientists wished to check what would happen to the seeds after being exposed to extraterrestrial (地外的) forces in lunar orbit and also hoped that they could develop beneficial mutations (突变). This mission offered good opportunities to scientists, which enabled them to deepen their studies on the effect of cosmic rays on the growth and evolution of life on Earth.
Space-based mutation breeding refers to the process of exposing seeds to forces such as microgravity, vacuums and cosmic radiation during a spaceflight and then sending them back to Earth for further observation and planting. Researchers observe and examine several generations of plants grown from space-bred seeds and investigate their mutations-some are positive and desirable while others are negative. Those with positive mutations will be kept and analyzed, and will be introduced to farmers after their certification and approval.
Space breeding can generate mutations faster and more conveniently than ground-based experiments and can bring about some desirable traits that are otherwise hard to introduce. Compared with natural or conventionally bred types of plants, space-developed versions with positive mutations usually feature higher nutritional content, greater annual yields, shorter growth periods and better resistance to diseases and insect pests.
China conducted its first space breeding experiment in 1987, using a satellite to carry seeds into space. Since then, hundreds of kinds of seeds and seedlings have traveled with dozens of Chinese spaceships. Space breeding has helped to produce more than 200 new types of mutated plants in China that have been approved for large-scale cultivation, ranging from grains to vegetables and fruits. The Chang'e 5 robotic mission returned 1,731 grams of lunar rock and soil to Earth, marking a historic accomplishment 44 years after the last lunar substances were taken back.
1. Why were the seeds placed inside Chang'e 5?| A．To pick out the fittest for mutations. | B．To understand extraterrestrial forces. |
| C．To study the intensity of cosmic rays. | D．To expose them to a special environment. |
| A．It is not a time-consuming process. | B．Mutations develop in a random way. |
| C．It often brings about desirable effects. | D．Approval will be granted to mutated plants. |
| A．It is a custom to put seedlings on a spacecraft. |
| B．China was the first to do a space breeding experiment. |
| C．It is some time since seeds were last taken into space. |
| D．Space breeding has brought us commercial benefits. |
| A．Space-bred Seeds Offer Great Chances | B．Chang'e 5 Returns with a Big Package |
| C．Plant Mutations Result in a Better Life | D．Seeds from Space Mark a New History |
2 . If you're daydreaming of future travels while stuck at home during the Covid-19 outbreak, why fantasize about the beaches of Ball or the canals of Venice when vacationing in space could be in your future?
Back in 2019, Californian company the Gateway Foundation released plans for a hotel that could one day float above the Earth's atmosphere. This futuristic concept was scheduled to be fully operational by 2027.
Now the hotel, Voyager Station, is set to be built by Orbital Assembly Corporation, a new construction company run by former pilot John Blincow, who also heads up the Gateway Foundation.
In a recent interview, Blincow explained there had been some Covid-related delays, but construction on the space hotel is expected to begin in 2026, and a hotel in space could be a reality by 2027.
"We're trying to make the public realize that this golden age of space travel is just around the corner. It's coming. It's coming fast," said Blincow.
Space tourism is becoming an increasingly hot topic, and there are several companies trying to make it happen — from Virgin Galactic to Elon Musk's SpaceX.
The team behind Voyager Station have said they're hoping to eventually make a stay at the hotel equal to "a trip to Disneyland ".
The team are also hoping to build research stations and spark space tourism and commerce opportunities. They imagine the government or private companies might use the space hotel for training crews heading to the moon, Mars and beyond.
The eventual goal, as the team put it in 2019, is "to create a starship culture where people are going to space, and living in space, and working in space. And we believe that there's a demand for that."
1. What can we learn about the space hotel from the text?| A．Its construction has already begun. | B．It has been delayed due to Covid-19. |
| C．It can float to the moon, Mars and beyond. | D．It is in great demand worldwide. |
| A．The Gateway Foundation. | B．Orbital Assembly Corporation. |
| C．The government. | D．The universities. |
| A．Exploring outer space. | B．Competing with other companies. |
| C．Opposing space tourism. | D．Building a spaceship culture. |
| A．First Ever Space Hotel Is Coming | B．There Is A Place Like No Other |
| C．Research Stations Are Getting Popular | D．Human Explorations Are Endless |
3 . Caroline Woodward wakes each morning to the sound of waves crashing onto the rocks that surround her home, Lennard Island, British Columbia, Canada.
This rocky island is home to a bright white lighthouse with a fire engine red top. Lennard Island's lighthouse has been a fixture of the Western Canadian coast since 1904, when the first wooden lighthouse was built to guide sailors navigating the surrounding waters.
There's been a lighthouse keeper on Lennard Island ever since, and today, that job falls to Woodward, who also writes poetry and children's stories, and her husband Jeff George.
"I think many people have romantic, 19th century ideas of lighthouses," says Woodward. Not many of them are correct, she says.
No, she doesn't live in the tower itself — and no, she doesn't have much time to kill. What Woodward does have is a busy, fun, and rewarding role, one she wouldn't trade for the world.
Woodward and George take turns to send a 3:15 a.m. weather report to the local Coast Guard radio. It's the first of seven they deliver each day. They survey the sea and sky from the lookout points. Their routine work also involves maintaining the twelve buildings that make up Lennard Island Lightstation.
The couple work seven days a week — vacations come only when the Coast Guard organizes relief keepers. In between, there's time for tending to the garden, hiking, and keeping watch on the wildlife that populates Lennard Island and its spectacular surrounds.
"We have resident bald eagles, lots of gulls, crows, and water and shorebirds all the year round. We also host Pacific tree frogs and wonderful insects."
There are, fortunately, no bears or wolves, says Woodward.
The wildlife and landscapes provide plenty of inspiration for her writing, too. Woodward has recently finished a novel, which she says was inspired by the stunning surrounds of the North Pacific Ocean.
1. Which of the following is a duty of the lighthouse keepers?| A．Living in the tower of the lighthouse. | B．Sending seven weather reports daily. |
| C．Taking care of the garden. | D．Observing the wildlife on the island. |
| A．She values her job greatly. | B．She finds her job boring. |
| C．Reality disappoints her. | D．She wants to change her job. |
| A．She lives a romantic life there. | B．She secures long vacations. |
| C．Her creativity in writing is inspired. | D．Her physical health is improved. |
| A．Why Woodward becomes a lighthouse keeper. |
| B．What it is like to be a lighthouse keeper. |
| C．How the lighthouse keepers kill the time. |
| D．Where Woodward continues writing. |
4 . Tears well up in people's eyes for a lot of reasons. A teardrop running down the cheek is the ultimate symbol of sadness, but people may also cry because they just cut an onion, or maybe they're trying to blink out an eyelash.
For the most part, tears help maintain healthy eyes. When you blink, basal (基底的) tears clean and smooth the eyes, which helps you to see clearly, according to the American Academy of Ophthalmology. Moreover, reflex (反射性的) tears, or those that happen unconsciously, help clear the eyes of irritants (刺激物), including dust and the gas that's produced when a knife slices a raw onion, said Andre Silva, a doctoral student of psychology at the University of Minho in Portugal.
Emotions can also bring about tears in humans. These emotional tears can serve as a means of nonverbal communication. Silva said, “Babies cry to signal to their mothers that something's up. It's a pure attention call. Some people think that babies are capable of controlling adults by crying, but that idea is false and misleading, as a baby is not conscious of being tricky: In a way, we can consider these tears as being somewhere between basal tears and emotional tears.”
As people grow older, they begin to use their tears to express emotions, such as happiness or sadness. These tears may promote compassion and empathy in others. But beware of people who may use their tears to control others. “Some sensitive people may be easily controlled through the crying of others, and may easily shed tears that can also be used by others to control them,” he said.
So, emotional tears have both advantages and disadvantages. “They are a powerful communication device and a powerful manipulative (操纵别人的) device,” Silva said. Crying also makes it hard for some people to mask their feelings when they're in the middle of an extreme emotional state.
1. What's the function of reflex tears?| A．Reflecting our feelings. |
| B．Being used to affect others. |
| C．Serving as a means of interaction. |
| D．Clearing away harmful matters in the eyes. |
| A．Tears are usually used to pity others. |
| B．Babies burst into tears without tricks. |
| C．People mask their feelings when crying. |
| D．Blinking out an eyelash makes it easy to cry. |
| A．We ought to identify tears. |
| B．We should control babies, crying. |
| C．We need to smooth our eyes by emotional tears. |
| D．We can hardly fan others' sympathy by tears. |
| A．Why do people cry? |
| B．Why can tears control others? |
| C．How do people express emotions? |
| D．How can people make use of tears? |
5 . Twelve-year-old Lydia Denton was recently named the winner of CITGO's Fueling Education Student Challenge, where she earned $20,000 after creating the Beat the Heat Car Seat, which is a portable device placed in the car seat that not only senses weight over five pounds but monitors temperature when the baby is in the seat.
The soon-to-be seventh grader says she became inspired to make the invention after watching the news that babies were being left in hot cars, often by accident.“At first, I thought about raising money for the families, but that wouldn't fix the problem: I wanted to invent something that could prevent the deaths from happening.”
Lydia's device is started when it senses the weight of the child and the temperature setting reaches over 100 F (38℃). At that point, an alarm goes off and a warning is sent via SMS to the parents. If the parents don't reset the device within 60 seconds, a built-in GPS chip sends a message to local authorities with the vehicle's location. After many rounds of testing with her local 911, Lydia is proud to say that Beat the Heat Car Seat is a success.
Though many newer vehicles come with warning systems and smart seat systems, Lydia's goal was to create a device that would reach more people and that could also transfer from car seat to car seat as the child grew. She decided to use her prize money to continue making improvements on the device, which would sell for only about $40.
Lydia is now working with an instructor who is helping her with production and teaching her about business. Lydia hopes that her work will inspire more kids of her age to make their ideas come true. “Don't think that you have to accept things in the world. If there is something that bothers you, think of ways to make it better!”
1. Why did Lydia make the invention?| A．To win 20,000-dollar prize. |
| B．To raise money for unlucky families. |
| C．To help stop babies dying in hot cars. |
| D．To guarantee babies' safety in a car crash. |
| A．How it works. | B．What it consists of. |
| C．Why it raises the alarm. | D．How parents respond to it. |
| A．It will be much stronger. | B．It will be more affordable. |
| C．It will be less problematic. | D．It will be more effective on older kids. |
| A．No competition, no progress. |
| B．It's never too late to go into business. |
| C．One should be open to any suggestion. |
| D．Creative thinking is the key to success. |
6 . While flatmates can bring about stress and difficulty, they can also be great company and develop into wonderful, lifelong friends. Before making the decision to live with a flatmate or to live alone, consider carefully all the accompanying advantages and disadvantages.
Most people join forces with a flatmate primarily due to financial problem. A shared living space also means you're responsible for only half of the rent or shared bills. Additionally, when you're splitting costs, you can afford a better apartment than you could alone. However, money can become a point of argument for flatmates as well. If your flatmate gets laid off or quits his job, you may have to pick up his bill until he's back on his feet. Your flatmate may also insist he owe less because he doesn't use the shower too often.
In addition to bills and the rent, flatmates also typically share responsibility for unpleasant tasks, such as cleaning or doing the dishes. Without a flatmate, cleaning and tidying responsibilities are yours alone. However, flatmates also frequently end up sharing plenty of other things many people would rather not: use of the TV, the bathroom, food and even clothing, for example. You may have to wake up earlier than you'd like to get a hot shower before work or give up watching your favorite show because your flatmate beat you to it.
When you live alone, you get to determine the terms of your social life, and you go home to an empty house or apartment at the end of the day. That can be preferable if you're a serious student or professional, someone who needs to work and rest in the quiet of an apartment. With a flatmate, there are unexpected guests and your social options can expand sharply. Keep in mind, however, that having a flatmate means that he may feel social when you do not, and you may have to deal with wanted house guests.
1. What's the main reason for most people to share a flat?| A．Ensuring safety. | B．Saving money. |
| C．Sharing housework. | D．Reducing loneliness. |
| A．He likes a peaceful life. |
| B．He has excellent social manners. |
| C．He keeps everything in the room tidy. |
| D．He often turns away unexpected guests. |
| A．By describing the process. | B．By stating an argument. |
| C．By making comparisons. | D．By analyzing the outcome. |
| A．Buying a Flat or Sharing One? |
| B．The Reasons for Sharing a Flat. |
| C．How to Share a Flat with a Flatmate? |
| D．The Advantages and Disadvantages of Flatsharing. |
7 . Researchers at CU Boulder have developed a wearable device that changes the human body into a biological battery. The device is stretchy(弹性的) enough that you can wear it like a ring, sport band or any other thing that touches your skin. It also taps into a person's natural heat-employing thermoelectric generators to change the body's internal temperature into electricity. "In the future, we want to be able to power your wearable electronics without having to include a battery," said Jianliang Xiao, an associate professor at CU Boulder.
The concept may sound like something out of The Matrix film series, in which a race of robots have enslaved humans to harvest their precious organic energy. Xiao and his colleagues aren't that ambitious: Their devices can generate about 1 volt (伏特) of energy for every square centimeter of skin space-less volt per area than what most existing batteries provide but still enough to power electronics like watches or fitness trackers.
Scientists have previously experimented with similar wearable devices, but Xiao's is stretchy, can heal itself when damaged and is fully recyclable-making it a cleaner alternative to traditional electronics. "Whenever you use a battery, you're depleting(消耗) that battery and will, eventually, need to replace it," Xiao said. "The nice thing about our device is that you can wear it, and it provides you with constant power."
Just pretend that you're out for a jog. As you exercise, your body heats up, and that heat will radiate out to the cool air around you. Xiao's device captures that flow of energy rather than let it go to waste. "The thermoelectric generators are in close contact with the human body, and they can use the heat that would normally be sent into the environment," Xiao said.
1. What does Xiao expect of his device at present?| A．It will be used for medical purposes. |
| B．It will be made smaller and wearable. |
| C．It will change natural power into electricity. |
| D．It will supply constant power to wearable devices. |
| A．To give an explanation. | B．To make a comparison. |
| C．To introduce a topic. | D．To analyze the cause. |
| A．The strengths of Xiao's device. |
| B．The convenience of using a battery. |
| C．The replacement of wearable devices. |
| D．The development of traditional electronics. |
| A．It operates with plenty of power. |
| B．It is designed for practical use. |
| C．It benefits people's health in a way. |
| D．It's based on traditional electronics. |
8 . Bangkok's future hangs in the balance. Rising sea levels, unchecked development and rapid urban population growth have left millions helpless to natural disasters — scientists warn the city Bangkok may not survive the century.
But it does have a secret weapon in its battle to resist the impact of a hotter planet — LANDPROCESS, a Bangkok-based landscape architecture and urban design company founded in 2011 by the landscape architect Kotchakom Vbrkaakhom. She wants to shift the orientation from growth to the actions on environment and land and promotes mindful development instead of mindless construction.
She made her name by creating the internationally acknowledged Chulalongkorn University Centenary Park, an 11-acre space in central Bangkok, which tilts（倾斜）downward at a 3-degree angle, allowing rainwater to flow through the grass and wetlands. Water that’ s not absorbed by the plants runs down to a pond at the base of the park, where it can be stored for use during dry spells. In case of severe flooding, the park can hold up to a million gallons of water.
In 2018, she created Asia’s largest rooftop farm, which imitates the region’s famed rice terraces（梯田）, preserving both water and soil. Uniquely, winding around the 22,400m2rooftop is a jogging path and a lawn.
Green space design of ecological cities emerged one after another, which not only expanded the design ideas of landscape industry, but also provided new strategies for people to deal with climate problems.
Later this year she will carry out plans to transform a vast, unused bridge crossing the Chao Phraya River into a park with bicycle lanes, bringing more green space. Kotchakom has even greater ambitions for her hometown — she wants to reuse the more than 1,000 canals that snake through Bangkok that are currently used for waste water. "Canals have so much life, so much potential to be public green space and a skeleton（框架）of the whole city," she explains.
LANDPROCESS has always listened to the needs of the society, and established a harmonious relationship between nature and human beings through design, so as to create a public landscape that can really give back to the society.
1. Why is Bankok’s future mentioned in paragraph 1?| A．To make a prediction of the city. |
| B．To provide some scientific knowledge. |
| C．To stress the urgency of solving problems. |
| D．To draw readers’ attention to climate change. |
| A．Its space. | B．Its green coverage. |
| C．Its landscape. | D．Its tilt design. |
| A．She collects rainwater for industrial use. |
| B．Her rooftop farm has made the best of urban spaces. |
| C．She will reconstruct the canals to recycle waste water. |
| D．She always designs sports facilities in her green parks. |
| A．A Productive Architecture Company |
| B．An Architect with Green Growth Mindset |
| C．Bangkok's Future Hangs in the Balance |
| D．Mindful and Mindless Construction in Bangkok |
9 . A few degrees can make a big difference when it comes to food storage. Foods can go bad if they get too warm. But for many of the world’s poor, finding a good way to keep food cool is difficult. Refrigerators are costly and they need electricity.
Yet spoiled food not only creates health risks but also economic losses. Farmers lose money when they have to throw away products that they cannot sell quickly.
But in nineteen ninety-five a teacher in northern Nigeria named Mohammed Bah Abba found a solution. He developed the “Pot-in-Pot Preservation/Cooling System.” It uses two round containers made of clay. A smaller pot is placed inside a larger one. The space between the two pots is filled with wet sand. The inner pot can be filled with fruit, vegetables or drinks. A wet cloth covers the whole cooling system.
Food stored in the smaller pot is kept from spoiling through a simple evaporation(蒸发) process. Water in the sand between the two pots evaporates through the surface of the larger pot, where drier outside air is moving.
The evaporation process creates a drop in temperature of several degrees. This cools the inner pot and helps keep food safe from harmful bacteria. Some foods can be kept fresh this way for several weeks.
People throughout Nigeria began using the invention. And it became popular with farmers in other African countries. Mohammed Bah Abba personally financed the first five thousand pot-in-pot systems for his own community and five villages nearby.
In two thousand, the Rolex Watch Company of Switzerland honored him with the Rolex Award for Enterprise. This award recognizes people trying to develop projects aimed at improving human knowledge and well-being. A committee considers projects in science and medicine, technology, exploration and discovery, the environment and cultural history. Winners receive financial assistance to help develop and extend their projects.
1. What keeps the food fresh in the container from spoiling?| A．The wet cloth covering the cooling system. |
| B．The moving drier air outside the container. |
| C．A drop in temperature by evaporation. |
| D．The wet sand between the containers. |
| A．Rich and advanced families. |
| B．Poor and underdeveloped areas. |
| C．Scientific experiment laboratories. |
| D．Supermarkets needing to store goods |
| A．financed the systems in all communities |
| B．invented the controversial cooling system |
| C．received financial assistance for his invention |
| D．invented a more complex cooling system later |
| A．Spoiled Food Creates Health Risks and Economic Losses |
| B．The Evaporation Process Creates a Drop in Temperature |
| C．A Few Degrees Can Make a Big Difference for Storage |
| D．A Cooling Way to Keep Food from Spoiling |
10 . JeffBezos has a rule at Amazon, or perhaps more appropriate a philosophy. If a team cannot be fed by two pizzas then that team is too large. The reasoning is quite straightforward and basic. More people means more communication, more bureaucracy, more chaos, and more of pretty much everything that slows things down, hence why large organizations are oftentimes considered as being so inefficient.
In 2013 Gallup released a report called “The State of The American Workplace", in which they found that smaller companies had more engaged employees. In fact,42% of employees working at companies of 10 or fewer were engaged at work versus only 30% of employees at large companies.
Most people are not familiar with the Ringelmann Effect which is the tendency for individual members to become less productive as the size of a group increases. This concept was named after Maximilien Ringelmann, a French professor of agricultural engineering who passed away in 1931.In one of his experiments he asked volunteers to perform a very simple task, to pull on a rope. He found that when only one person is pulling on the rope they give 100% of their effort; however, as more people are added the individual effort goes down.
This experiment was recreated in the 1970's by Alan Ingham who came up with the concept of “social loafing” which helps us understand why the individual effort decreases as the team size increases. So why does this happen? Because it becomes harder to extract the individual contributions and performance of each person.
Organizations should really think about what their team structures look like and create and follow similar “two pizza rules”. It's no coincidence that smaller organizations are oftentimes more nimble while large organizations look like they are stuck in the mud.
1. What is the author's purpose of mentioning “two pizza rules” in paragraph 1?| A．To make a comment. |
| B．To introduce the topic. |
| C．To provide an example. |
| D．To analyze a phenomenon. |
| A．It repeated the Ringelmann Effect experiment. |
| B．It was based on a simple task of pulling a rope. |
| C．It aimed to explore the reason behind the phenomenon. |
| D．It revealed the link between team size and individual effort. |
| A．Balanced. |
| B．Complicated. |
| C．Simple. |
| D．Flexible. |
| A．What Makes a Team More Productive? |
| B．Why Are Smaller Teams Better Than Larger Ones? |
| C．How Can Two Pizzas Be Shared by One Team? |
| D．Which Is More Important: Individual Effort r Team Size? |
