1 . It's easy to understand why early humans domesticated (驯养)dogs as their new best friends, domesticated dogs can guard against fierce animals and provide warmth during cold nights. But those benefits only come following domestication. Despite more than a century of study, scientists have struggled to understand what caused the domestication process in the first place.
A new theory given by Maria Lahtinen, a senior researcher, might be able to explain this puzzle. She made this theory when studying die diet of late Pleistocene hunter-gatherers in Arctic and sub — Arctic. At that time, around 20,000 to 15,000 years ago, the world was buried in the coldest period of the last ice age. In cold environments then, as today, humans tended to gain the majority of their food from animals. Nutritional deficiencies (缺失) came from the absence of fat and carbohydrates (碳水化合物), not necessarily protein. Indeed, if humans cat too much meat, they can develop protein poisoning and even die. "Because we humans are not fully adapted to an all-meat diet, we simply cannot digest protein very well," Lahtinen says.
During the coldest years of the last ice age — and especially in lough Arctic and sub-Arctic winters — reindeer, wild horses and other animals that humans killed for food would have been struggling to live. Using previously published early fossil records, Lahtinen and her colleagues calculated that the game captured by people in the Arctic and sub-Arctic during this time would have provided much more protein than they could have safely consumed.
1. What has been confusing scientists in the past century?| A．How domesticated dogs benefited humans. |
| B．When humans began to domesticate dogs. |
| C．What led to dog domestication originally. |
| D．Why early humans made friends with clogs. |
| A．It can be fatal in a short period of time. |
| B．He will probably digest it very well. |
| C．He can develop carbohydrates poisoning. |
| D．He will survive the cold environment. |
| A．The fierce contests. | B．The hunting activities. |
| C．Wild animals or birds. | D．Some tricks or schemes. |
| A．They struggled with wild horses. |
| B．They shared extra meat with dogs. |
| C．They struggled to live a good life. |
| D．They had trouble adapting to the cold environment. |
2 . When British musician Paul Barton performs in central Thailand lately, the listeners react wildly. Some pull his hair or jump on his piano. Others steal his music. The behavior is normal, however, because these crowds are truly wild—wild monkeys to be exact.
Barton plays often to the animals in Lopburi, an area known for its populations of wild monkeys. The pianist hopes the music shows bring calm to the animals during the corona virus(COVID-19) crisis.
The disease has caused problems for the monkeys, too. They are hungry. The restrictions on tourism mean fewer people come to see the monkeys and feed them.
The monkeys quickly surround Barton when he plays Greensleeves, Beethoven's Fur Elise and Michael Nyman's Diary of Love. Some of the creatures sit on his chair, while others climb up his body and touch his head. But, Barton keeps his attention on his performance, even as a small monkey runs over his hands on the instrument. Other monkeys take control of his music papers. “I was glad and surprised to find that they were actually eating the music as I was playing it.”
The monkeys are Barton's latest animal fans. Past wildlife audience included elephants living in special protected areas. Barton hopes to raise people's awareness of the monkeys' hunger. At the same time, he hopes to study their behavior as they react to classical music.
“Come together and don't let the pandemic stop the wild monkeys getting good nutritious food. We need to make an effort to make sure that they eat properly. And when they eat properly they will be calmer,” said 59 -year-old Barton.
1. Why does the musician play to the wild monkeys?| A．To see the wild animals just being themselves. | B．To study their behavior as they react to pop music. |
| C．To raise money for the wild monkeys' hunger. | D．To help calm them during COVID -19 crisis. |
| A．Contemporary music. | B．Classical music. |
| C．Country music. | D．Popular music. |
| A．Stealing his music papers. | B．Eating his music papers. |
| C．Disturbing his performance. | D．Enjoying his playing |
| A．Wild monkeys like to play with the musician. | B．People will start to protect the wild monkeys. |
| C．The COVID-19 has damaged much to the world. | D．Music can make the wild animals more active. |
3 . Arguster grew up on his family’s farm in a remote village. Planting cash crop — cotton, they were breaking even and had to make ends meet. In his childhood, there were nine kids at home. All the boys were in one room with two beds. Two slept at the head while two slept at the foot. Therefore, there was one thing about their feet — washing them before crowding onto the bed.
When there was a hole in Arguster’s jeans, his mother would put a patch on it. However, the hole kept going. It was the naughty kids, Arguster included, that took the jeans out, hung them on a line and shot them to put holes. Aware of that, however, Ben, the father, didn’t rebuke them, knowing it might be the only way to bring laughter to his kids.
Arguster’s first lesson in economics was taught by Ben. The childish kid had worked and made a little extra money. He couldn’t help admiring himself, “I make six dollars! Six dollars! Man! I’m on the top of the world!” With a great thrill, Arguster decided to go to fair, where he played games, ate cotton candy... When asked by Ben how much he had spent, with his head down, Arguster replied, “Daddy, I spent it all...” Looking at his messy hair, Ben sighed, “Boy, you spent all your money and haircut’s gone up to 75 cents. I’m afraid...” From then on, Arguster always kept enough money to get himself a haircut.
Ben taught his kids how to do the right thing and wanted them to do the right thing, which Ben tried to pass on to his kids, in his own way. Ben started a syrup mill(糖坊). People in the community brought their cane and millet for Ben to grind up (磨碎) for syrup. When people paid with buckets of syrup, Ben refused. Arguster got confused, “Daddy, why don’t you let these people pay you?”
“Because we got enough syrup to last for a long time! Son, these people don’t have money to pay. That’s the only way they can pay.”
1. Why should the kids wash their feet before going to bed?| A．Because they turned dirty after playing on the farm. |
| B．Because they crowded on a small bed with feet close to others’ heads. |
| C．Because the beds were made of cotton which was easy to spot. |
| D．Because they had to make ends meet, making them seldom bathe. |
| A．Question. | B．Oppose. | C．Amuse. | D．Criticize. |
| A．He worked and earned money again for his haircut. |
| B．He had his hair cut with the money Ben gave him. |
| C．He waited for the price of haircut to decrease. |
| D．He borrowed money from his mother for his haircut. |
| A．Strict. | B．Casual. | C．Considerate. | D．Mean. |
4 . A new study has found that ride-sharing services result in much more pollution than other kinds of private and public transportation. Ride-sharing trips also draw passengers away from more environment friendly methods of travel, like public transportation, walking or biking, the study found.
Several studies in recent years have suggested that ride-sharing services like Uber and Lyft can worsen traffic problems in cities. The new study represents an attempt to center on how ride-sharing services affect pollution. Overall, the researchers reported that ride-sharing trips now "result in a 69 percent more climate pollution on average than the trips they replace." The study notes that the same passengers could have chosen to travel by bus, train, bike or on foot.
One of the big reasons they give for this result is that ride-sharing vehicles are often driven with no passengers in the car. This happens when drivers are either waiting for rider requests or on the way to pick up passengers. This situation, known as "deadheading", takes up about 42 percent of all ride-sharing driving activity, the study found. The researchers said that deadheading results in about 50 percent more carbon dioxide than one person driving in a private vehicle. Both Uber and Lyft have said in the past that most studies on the subject overstate (夸大)the effects of their services on pollution. Uber told Reuters news agency in a statement it had no comment on the latest report and that the study made misleading claims about ride-sharing. Meanwhile, the company said it would work directly with cities to address climate changes, promoting sharing trips and other means of transportation.
1. Which of the following is the best title of the passage?| A．Ride-sharing becomes a new trend that can’t be avoided. |
| B．Ride-sharing industry is met with criticism. |
| C．Ride-sharing services increase pollution. |
| D．Ride-sharing services need improvement. |
| A．a driving process where the driver is not carrying passengers |
| B．a potential risk that the driver may lose control of the vehicle |
| C．a period of driving hours when vehicles produce more carbon dioxide |
| D．a situation in which a driver has too many passengers to pick up |
| A．Ride-sharing attracts exactly the same number of people as traditional means of transport |
| B．the study was conducted to prove the influence of ride-sharing services on modern cities |
| C．ride-sharing service is not an environmentally friendly way to travel |
| D．the new report has forced Uber to make big changes to achieve its goal |
5 . As spring arrives, farmers around the world are making decisions about what crops to plant and how to manage them. In the U. S., farmers typically have big data to help make these decisions. These data have a clear upside. They make farms more productive. In the U.S., the past five years have seen a series of good harvests for both corn and soybean. A big part is generated by effectively using data to produce more food from the same amount of land, seed and fertilizer.
In the poorer parts of the world, however, the picture is much different. Many farmers are guided only by their history with the land and their community's traditions. Their skills and knowledge are impressive, but they suffer from a poverty of data. They rely on technical advisors for advice from governments and academic centers who often have very little knowledge of the local area. For seeds and fertilizers and other materials used in the field, they rely on companies that lack data on how their products will perform in the local conditions.
About 10 years ago, East African officials and their development partners started to explore why so few smallholder dairy farmers made profits from growing demand from urban consumers. Surveys of farmers in the region suggested poor access to veterinary(禽畜的) care and breeding assistance. An effort to provide these services has helped farmers get more milk.
Data would matter little if farming was easy and the paths to productivity were obvious. But in reality, agriculture is a complex mix of many factors, including climate, biology, chemistry, physics, economics and culture—all of which vary from region to region. In this situation, good data is necessary.
1. How has big data benefited American’s farmers?| A．By producing more seeds and fertilizer. |
| B．By helping the farmers to make decisions. |
| C．By informing the farmers to plant crops earlier. |
| D．By increasing the amount of land for farming. |
| A．Big data. | B．Farming skills. | C．Technical guidance. | D．Farming materials. |
| A．To show that East Africa relies heavily on diary farming. |
| B．To illustrate cooperation between countries was a great success. |
| C．To serve as an example of how data helps farmers in poor areas. |
| D．To prove that city people in East Africa didn't like drinking milk. |
| A．Many changeable factors have influence on farming. |
| B．The American farmers can't decide what they will plant. |
| C．East African dairy farmers were experienced in raising cows. |
| D．The technical advisors in poor areas know the local areas well. |
6 . Real financial security and freedom is not in our job but in our passion. It’s easy to define and evaluate a man by his pursue Joseph Campbell once said, “Follow your dream and the universe will open doors where there are only walls.”
In life, we’ll always be found doing any of these two things: either making a living or making a difference. Pensions (养老金)and salaries stop many from pursuing excellence while passion unlocks hidden potentials that equip us for challenges and opportunities. A job helps us make a living while passion enables us to make a difference.
I want to sincerely help to adjust and clarify the misguided belief among workers that a job is a means of livelihood. Rather, it should be a means to fuel our passion. The earlier you realize this basic truth of life, the more clearly you'll be able to position yourself in living a life of impact and value.
The success of Kentucky Fried Chicken（KFC）shows how meaningful it is to pursue your passion instead of your pension. Its founder, Colonel Harland Sanders, didn’t realize this until he was given his first social security check of 105 dollars. But he decided that there surely was something to do for himself and other people instead of living on that small pension. He was determined to engage himself in what brought him impact and value. Drawing inspiration from his mother's special recipe for fried chicken, he invented “finger-licking” seasoning with eleven spices and herbs. Despite much rejection, he managed to round up some investors and promote company's rapid expansion to more than 6,000 locations. Sanders’ life pointed towards two facts about making a difference: one, there is no age that is too old to make a difference; two, there is nothing too small or insignificant to make a difference with, as long as it is your passion.
1. How does the author support his argument in paragraph 2?| A．By listing examples. |
| B．By showing contrast. |
| C．By including a quote. |
| D．By sharing his experience. |
| A．Deeply moved. | B．Pleasantly surprised. |
| C．Greatly relieved. | D．Internally motivated. |
| A．Pursue our passion. |
| B．Get a well-paid job. |
| C．Secure our position. |
| D．Get career guidance. |
| A．Passion or Pension? |
| B．Following Your Dreams |
| C．Working for Pension |
| D．To Work or not to Work? |
7 . This was the first real task I received in my new school. It seemed simple: go on the Internet and find information about a man named George Washington. As I searched the name, I found that there were two famous people having the same name who looked completely different! One invented hundreds of uses for peanuts(花生), while the other led some sort of army across America. I stared at the screen, wondering which one my teacher meant. I called my grandfather for a golden piece of advice; let the coin decide. I flipped(掷) a coin and Ah! Tails (背面)! My report would be about the great man who invented peanut butter, George Washington Carver.
Weeks later, I stood in front of the classroom and proudly read my homework. But things started to get strange. I looked around the room, only to find my classmates with big smiles on their faces and tears in their eyes and my stone-faced teacher. I was completely lost. “What could be causing everyone to act this way?”
Oh well, I dropped the paper and sat down at my desk, burning to find out what I had done wrong. As a classmate began his report, it all became clear, “My report is on George Washington, the man who started the American War of Independence.” The whole world became quiet! How could I know that my teacher meant that George Washington?
Of course, my subject result was awful. Sad but fearless, I decided to turn this around. I talked to the headmaster Miss Lancelot, but she said firmly: No re-dos; no new score. I felt that it was not fair, and I believed I deserved a second chance. So I threw myself heartily into my work for the rest of the school year. Ten months later, I sat in the headmaster’s office again, but this time a completely different conversation. I smiled and flashed back to the terrible moment at the beginning of the year as the headmaster told me I was good enough to skip(跳过) the 6th grade and started the 7th grade next term.
1. The task I received was to find information about ________.| A．uses for peanuts |
| B．American War of Independence |
| C．George Washington |
| D．my headmaster Miss Lancelot |
| A．I was too proud of my homework |
| B．I mistook what the homework was about |
| C．the whole world suddenly became quiet |
| D．the teacher’s face turned to a stone |
| A．the headmaster didn’t like the writer at all |
| B．the writer’s classmates felt sad at his mistake |
| C．the writer knew little about American history |
| D．the writer’s grandpa was a very wise man |
| A．Seeing is believing. |
| B．Where there is a will, there is a way. |
| C．One is never too old to learn. |
| D．A friend in need is a friend indeed. |
8 . Ms. Blake wanted to leave the San Francisco Bay Area. Her parents had bought a house on a large plot of land near a gateway to Yosemite National Park. Benjamin could stay with them while she worked at a supermarket in town. He could run around in the hills. What she hadn’t quite accounted for, though, is how the hills are becoming hotter, drier and more dangerous.
A year after they moved came the first of an annual series of wildfires, and an asthma diagnosis (哮喘诊断) for Benjamin. One year, they had to leave from their home for a few days. Another year, they bought air-conditioners so they could keep the windows shut when the air got thick and smoky. This year, just as it seemed like Benjamin’s asthma was relieving, came the Creek Fire in the hills nearby. The air turned white with smoke. The boy had what appeared to be a mild asthma attack.
Ms. Blake struggles to explain to him why he can't be outside exploring. She worries when he goes to school. She wonders how much longer the family will be able to insure their home if rates climb higher — and what they’ll do if insurance becomes unavailable at any price. “It seems every year there’s some major fire,” Ms. Blake said. “We're smoked out. It's hard to breathe. It's always a worry that you' re going to have to flee or you1 re going to lose your home.” She said she had spent in the neighborhood of $1,000 this year to equip her home. “To protect my son of course I’m going to do that,” she said. “But it' s fundamentally unfair.”
1. What can be learned from Paragraph 1-2?| A．Benjamin likes living in San Francisco Bay Area |
| B．Benjamin didn’t have an asthma before moving. |
| C．Ms. Blake stayed with her son while working. |
| D．Ms. Blake could explain how the hills are becoming drier. |
| A．To help cure Benjamin’s asthma. |
| B．To keep the air cool in hot summer. |
| C．To keep the air drier in the house. |
| D．To keep the windows shut when necessary. |
| A．Some dry brush and dead trees caused fire. |
| B．Series of wildfires attacked his living area. |
| C．The weather became hotter and drier. |
| D．The air got thick and smoky in the San Francisco Bay Area. |
| A．Anxious and angry. |
| B．Concerned and confused. |
| C．Unconcerned and uninterested. |
| D．Positive and hopeful. |
9 . To walk is to be human. We' re the only creature that gets around by standing up and putting one foot in front of the other. In the more than 4 million years that humanity' s ancestors have been u-sing only two legs for walking, our ability to walk upright has allowed humankind to travel great distances and survive changing climates, environments and landscapes.
But walking is more than just transportation. It also happens to be really good for us. Countless scientific studies have found that this simple act can provide a number of health benefits and help people live longer. In fact, a walking routine-if done properly-might be the only exercise people need.
How much walking should one aim for? You’ve likely heard we need 10,000 steps a day. That’s about 5 miles. But contrary to popular belief, this recommendation doesn’t come from science. Instead, it stems from a 1960s advertising campaign to promote a pedometer(计步器)in Japan. Perhaps because it's a round number and easy to remember, it stuck.
Since the 1960s, researchers have studied the 10,000 - steps - a - day standard and have turned up mixed results. Although 10,000 steps is certainly a healthy and worthwhile goal, it’s not a one - size - fits - all recommendation.
For instance, a recent Harvard University study involving more than 16,000 senior women found that those who got at least 4,400 steps a day greatly reduced their risk of dying early when compared with less active women. The study also noted that these benefits continued up to 7, 500 steps before leveling off. This 7,500 mark isn't surprising: It’s in line with common public health recommendations, such as the Centers for Disease Control and Prevention’s recommendation of 150 minutes of moderate (适度的) physical activity a week for adults.
Research has shown that picking up the pace might be a good idea, too-fast enough to raise your heart rate, even if just for a short burst.
1. Which statement will the author believe?| A．Walking 10000 steps a day fits us all who lack exercise. |
| B．Walking is the only exercise that unhealthy people need. |
| C．To be healthy, walking great distances is strongly suggested |
| D．The benefits of walking depend on frequency, intensity and duration |
| A．A walking routine | B．A round number |
| C．The popular belief | D．The pedometer Ads. |
| A．4,400 steps a day. | B．7,500 steps a day. |
| C．10,000 steps a day. | D．150 minutes a day. |
| A．The Only Exercise You Need-Walking |
| B．10,000 - Step Goal Is More Marketing Than Science |
| C．Walking Is One Of The Best Exercises For Health |
| D．Walk Often, Walk Fast And Walk Long |
10 . On the way to his home the child turned many times and beat the dog,declaring with childish gestures that he held him in contempt(茂视）as an unimportant dog.the dog apologized for being this quality of animal and expressed regret in fine form,but he continued stealthily to follow the child.
When the child reached his door-step,the dog was a few yards behind,moving slowly toward him.He became so anxious with shame when ho again faced the child that he forgot the dragging rope . He tripped(绊倒） upon it and fell forward.
The child sat down on the step and the two had another interview. During it the dog greatly exerted himself to please the child. He performed a few playful jumps with such abandon(尽情地） that the child suddenly saw him to be a valuable thing. He made a swift,greedy charge(猛冲）and seized the rope.
He dragged his captive(俘虏） into a hall and up many long stairways in a dark building. The dog made willing efforts, but he could not walk very skillfully up the stairs because he was very small and soft,and at last the pace of the child grew so energetic that the dog became panic-stricken. In his mind he was being dragged toward somewhere unknown. His ayes grew wild with the terror of it. He began to wiggle his head wildly and to brace his legs.
The child redoubled his efforts.They had a battle on the stairs.The child was victorious because he was completely absorbed in his purpose,and because the dog was very small.He dragged his acquirement to the door of his home,and finally with victory across the doorway.
No family member was in.The child sat down on the floor and made overtures to(向....示好） the dog.These the dog instantly accepted.He smiled with affection upon his new friend.In a short time they were firm and abiding(矢志不渝的）comrades.
1. What might have happened before the first paragraph?| A．The child had wanted to own the dog for a long time. |
| B．The dog had been someone else' s pet but lost his way. |
| C．The child had been looking for the lost dog for a long time. |
| D．The dog had been driven out of home by the child's family. |
| A．The dog's apology. |
| B．His first interview with the dog. |
| C．His pity on the dog. |
| D．The dog's pleasing performance. |
| A．The boy was naughty. |
| B．The dog was foolish. |
| C．The boy was a devoted friend. |
| D．The dog was a faithful friend. |
| A．Frightened-relieved-anxious-happy. |
| B．Worried-angry-scared-delighted. |
| C．Guilty-anxious-nervous-pleased. |
| D．Angry-regretted-scared-puzzled. |
