1 . After beating bone cancer, Hayley Arceneaux thinks rocketing into orbit on SpaceX’s first private flight should be no problem at all. St. Jude Children’s Research Hospital announced the 29-year-old doctor’s assistant will rocket into space later this year.
Arceneaux, a former patient at St. Jude, will become the youngest American in space, beating NASA record-holder Sally Ride by over two years. She will travel with businessman Jared Isaacman, who is using the spaceflight he bought to raise money for charity. Two other yet-to-be-chosen space flyers will join them. Arceneaux will be the first person to launch with a prosthesis an artificial device that replaces a missing or injured part of the body. When she was 10, Arceneaux had an operation at St. Jude to replace her knee and a piece of metal was put in her left leg. She still limps and has occasional leg pain.
“My battle with cancer really prepared me for space travel,” she recently told The Associated Press. “It made me tough, and then also I think it really taught me to expect the unexpected and go along for the ride.” Arceneaux wants to show her young patients and other cancer survivors that “the sky is not even the limit anymore.” “It’s going to mean so much to these kids to see a survivor in space.” she said.
Isaacman announced his space flight on February 1, promising to raise $200 million for St. Jude. As the flight’s self-appointed commander, he offered one of the four seats aboard SpaceX’s Dragon spacecraft to St. Jude. The hospital chose Arceneaux from among its many workers who had once been patients. The idea was that one of them could represent the new generation, noted Rick Shadyac, president of St. Jude’s financing organization.
Arceneaux was at home in Memphis, Tennessee, when she got a surprising call in January. She was asked if she would represent St. Jude in space. As a lifelong space fan who loves adventures, Arceneaux has traveled widely and loves roller coasters. Isaacman, who flies fighter airplanes for fun, considers her a perfect fit. The launch is planned for this fall at NASA’s Kennedy Space Center, with the spacecraft orbiting Earth for two to four days.
1. Which statement is true about Hayley Arceneaux?| A．She works where she used to be a patient. |
| B．She is an adventure hater. |
| C．She is the youngest American in space. |
| D．She is the first woman space flyer. |
a. She received a surprising call. b. She was diagnosed with a serious disease.
c. She was chosen to rocket into space. d. She was operated on at St.Jude.
| A．a c d b | B．b c d a | C．b d a c | D．c a b d |
| A．To carry out medical research. |
| B．To explore space. |
| C．To expect the unexpected. |
| D．To collect money. |
| A．Generous and strong. |
| B．Caring and optimistic. |
| C．Brave and honest. |
| D．Patient and representative. |
2 . A Wolf in Danger
What is happening to the timber wolf (森林狼) today?
Native Americans and early settlers often went to sleep to the sound of a lonely lullaby (催眠曲). It was the song of the wolf howling in a distant forest. There were many wolves then. One kind was the North American timber wolf.
Wolves are important to the balance of nature because they eat sick and weak animals. In Colorado, people tried to help deer by shooting wolves. But then there were so many deer that many of them starved to death.
The timber wolf is on the endangered special list . Animals on this list are in danger of disappearing from the earth. People drove the wolves away by cutting down the forests to build houses, towns, and highways. Timber wolves are now found only in Canada, Alaska, Michigan, and Minnesota.
This special animal may soon disappear from our forests forever. Then, its lonely howl will never be heard again.
1. Animals that are in danger of disappearing from the earth are called a(n)_______species.| A．endangered |
| B．living |
| C．alive |
| D．lived |
| A．are an endangered species |
| B．eat sick and weak animals |
| C．no longer live in forests |
| D．help the farmers |
| A．in many parts of North America |
| B．only in Colorado and Canada |
| C．in towns and cities in Alaska |
| D．in many parts of Africa |
| A．People built towns and highways. |
| B．The timber wolf was driven away from its home. |
| C．People cut down the forests. |
| D．Timber wolves are endangered species. |
3 . SAN FRANCISCO — A dog that survived the catastrophic wildfire in Northern California apparently protected the ruins of his home for almost a month until his owner returned.
Madison was there waiting when Andrea Gaylord was allowed back to check on her burned property in Paradise this week. Gaylord fled when the Nov. 8 fire broke out and destroyed the town of 27 ,000. Shayla Sullivan, an animal rescuer, who responded to Gaylord’s request to check on Madison first spotted the male Anatolian shepherd mix several days later.
Shayla Sullivan said the outdoor guard dog was mentally upset and kept his distance. Sullivan left food and water for him regularly until Gaylord got back on Wednesday. She also helped locate Madison’s brother Miguel, another Anatolian shepherd mix that was taken to a shelter 85 miles (135 kilometers) away after the wildfire.
“If the evacuees (疏散人员) can’t be there, I’m going to be there and I’m not going to give up on their animal until they can get back in,” Sullivan said.
The dogs reunited Friday when Gaylord came back to the property with Miguel and brought Madison his favorite treat: a box of Wheat Thin crackers.
Gaylord told news station ABC10 she couldn’t ask for a better animal. “Imagine the loyalty of hanging on in the worst of circumstances and being here waiting,” she said. “Their job is to watch the sheep and we’re part of them.” Gaylord said about her dogs. “It’s a comforting feeling.”
1. Andrea Gaylord was deeply touched by Madison’s ________.| A．noble blood | B．special habit |
| C．being faithful to his master | D．narrow escape from the wildfire |
| A．Gaylord requested Sullivan to leave food and water for Madison. |
| B．Madison was afraid of getting close to Sullivan in the beginning. |
| C．Sullivan saved Miguel in order to comfort Madison. |
| D．Sullivan took both two dogs to a shelter 85 miles away. |
a. Miguel was taken to a shelter
b. the wildfire in Northern California broke out
c. Madison was treated with a box of Wheat Thin crackers
d. Andrea Gaylord applied for search and rescue of Madison
| A．d-c-a-b | B．b-d-a-c | C．d-a-c-b | D．b-a-c-d |
| A．Andrea Gaylord found Madison in a shelter. |
| B．Gaylord told news station she wanted for a better animal. |
| C．The Nov. 8 fire killed 27,000 people in the town. |
| D．Shayla Sullivan was kind-hearted and patient. |
4 . The history of microbiology begins with Dutch cloth maker named Antoni van Leeuwenhoek, a man of no formal scientific education. In the late 1600s. Leeuwenhoek, inspired by the magnifying lenses（放大镜）he used to examine cloth, built some of the first-microscopes. He developed technique to improve the quality of tiny, rounded lenses, some of which could magnify an object up to 270 times. After removing some plaque from between his teeth and examining it under a lens, Leeuwenhoek found tiny twisting creatures, which he called “animalcules”.
His observations, which he reported to the Royal Society of London, are among the first descriptions of microbes（微生物）. Leeuwenhoek discovered an entire universe invisible to the human eye. He found different microbes in samples of pond water, rain water, and human blood. He gave the first description of red blood cells, observed plant tissue, examined muscle, and investigated the life cycle of insects.
Nearly two hundred years later, Leeuwenhock’s discovery of microbes helped French chemist and biologist Louis Pasteur to develop his “theory of disease”. This concept suggested that disease originates from tiny organisms attacking and weakening the body. Pasteur’s theory later helped doctors to fight infectious diseases including anthrax, diphtheria, polio, smallpox, tetanus, and typhoid. All these breakthroughs were the result of Leeuwenhoek’s original work. Leeuwenhoek did not foresee this legacy.
In a 1716 letter, he described his contribution to science this way: “My work, which I’ve done for a long time, was not pursued in order to gain the praise I now enjoy, but chiefly from a strong desire for knowledge, which I notice resides in me more than in most other men. And therefore; whenever I found out anything remarkable, I have thought it my duty to put down my discovery on paper, so that the scientific community might be informed thereof.”
1. Which of the following best describes Leeuwenhoek?| A．trained researcher with an interest in microbiology |
| B．A curious amateur who made pioneer studies of microbes |
| C．A talented scientist interested in finding a cure for disease |
| D．A bored cloth maker who accidentally made a major discovery |
| A．the discovery of microbes |
| B．Pasteur’s theory of disease |
| C．Leeuwenhoek’s contribution |
| D．the origin of the tiny organism |
| A．He admitted that many of his discoveries happened by chance. |
| B．He considered his work to be central to later medical breakthroughs. |
| C．He was greatly concerned with improving people’s living conditions. |
| D．He believed the sharing of knowledge was a key to scientific progress |
a. Magnifying lenses were built.
b. The “theory of disease” was put forward
c. Microbes were discovered in samples of waters.
d. Leeuwenhoek’s first microscopes were successfully developed.
e. Leeuwenhoek explained his thoughts upon his own contribution.
| A．a-d-c-e-b | B．d-a-c-e-b | C．a-c-d-b-e | D．d-a-e-b-c |
5 . Rocky was a 65-pound dog. Rita was his eleven-year old owner. When Rocky was given to her, Rita immediately liked him. Whenever she was not in school,the two were always together and within touching distance. The family would lovingly call the pair “R and R”.
But Rocky had one shortcoming. He feared water very much because of a terrible experience. When he was at the age of seven weeks long before he met Rita,he was nearly drowned by a naughty boy who had been blamed by his father.
One late afternoon, Rita's mother took R and R to a shopping area near a lake. Rita was running along the wooden bridge over the water,enjoying the beautiful scenery around. Suddenly a boy on a bicycle hit Rita. She let out a cry of pain and fell into the lake.
Rita's mother was at the entrance of a store not far away. She rushed to the lake shouting for help. Rocky seemed to forget his fear and jumped into the water to save his owner. Rocky immediately swam to Rita and held her by the shoulder's clothes with his mouth. Rita's face was quickly out of the water and she could cough.Luckily,the water was calm,they were not far from the bank,and Rocky finally reached a depth where his feet were on solid ground. He pulled Rita hard until her head was completely out of the water, and then he stood beside her, licking (舔) her face.
Rita and her family firmly believed that it was only the big dog's love for the little girl that caused him to take action that might be life-dangerous.
1. From the text, we know __________.| A．Rita was once blamed |
| B．Rocky was eleven years old |
| C．Rita spent her spare time with Rocky |
| D．Rocky lived in Rita's home since his birth |
| A．Brave. | B．Honest. | C．Unkind. | D．Dangerous. |
| A．At noon. | B．At night. | C．In the morning. | D．In the afternoon. |
① Rocky came into Rita's life.② Rocky was nearly drowned.
③They were playing near the lake. ④ Rocky saved Rita from the water.
| A．①②④③ | B．②①③④ | C．③①②④ | D．④③②① |
6 . Eat like a king in the morning, a prince at noon, and a peasant at night. This saying is all about the importance of breakfast. And now scientists can tell us just why it’s so important. According to a study carried out at Imperial College London, UK, skipping the first meal of the day not only means you eat more at lunch, but also that your brain wants to find more unhealthy foods.
The study suggests that there is a special part of our brain called the orbitofrontal cortex, which plays an important part in making choices about what we eat. It is used for identifying the taste of food, especially when skipping breakfast. It is more likely to target high-calorie foods when you’re on an empty stomach.
Scientists did an experiment on this. Dr Tony Goldstone from Imperial College London, scanned the brains of 21 men and women, around the age of 25. On the first day, these people skipped breakfast before the scans. On the second day, they had cereal, bread and jam as breakfast. After the scan on both days, they had their lunch.
When the volunteers had skipped breakfast, they ate around 20 percent more at lunch, compared with days when they had eaten breakfast. Their brain scans also showed the orbitofrontal cortex was especially responsive to high-calorie foods. “We believe that bit identifies the value of foods — how pleasant, how delicious something is,” Goldstone told The Guardian.
1. From Paragraph 1, we learn that ________.| A．scientists found out why eating breakfast is important |
| B．it’s easy to lose weight without breakfast |
| C．there’s no need to have good food for supper |
| D．eating breakfast makes your brain smarter |
①The volunteers skipped breakfast. ②The volunteers had lunch.
③The volunteers had a brain scan.
| A．①②③ | B．③②① | C．①③② | D．③①② |
| A．of the usual breakfast | B．more than the usual breakfast |
| C．of the usual lunch | D．more than the usual lunch |
| A．Breakfast still most important | B．Three meals a day |
| C．Experiments on breakfast | D．Experiments on lunch |
7 . When I was about twelve, I headed to a restaurant for dinner with my family. It was a windy winter night. As my mom and I headed towards the restaurant from our car, a girl about my age and her mother came up to us. They asked if we had any spare dollars. My mom immediately asked where they kept their things. They pointed to an old car in the parking across the street. The girl said there were six of them living in that car, the same size as my own family.
My mom said she had something to do after handing the people a few dollars. She sent me inside the restaurant with my dad and my three siblings(兄弟姐妹). But she didn’t come.
Later, I found out she had gone home and emptied our cupboards into a few bags. Then, she brought that food over to the car and handed the bags to the family. I wasn’t there when that part happened, but I could imagine the joy it brought to their faces.
A few days later, when I actually found out about what she had done, I asked her why she helped those people. She told me that they were not lucky. I remember the face of that girl who had asked us for dollars;she was the same age as me, yet our lives were so different.
Here I stood, dressed in almost new clothes, headed to a restaurant and then back home to the bedroom I shared with my younger sister. I remembered thinking that the girl didn’t have any food to eat and that she was heading back to a cold car shared with five other people.
After painting this picture in my mind, I understood my mom. I will never forget what she did that night. And that night I also learned one of the best lessons she taught me.
1. We learn from the passage that the girl about the writer’s age_____.| A．lived a hard life |
| B．had her own bedroom |
| C．received a good education |
| D．made friends with the writer |
a. My mom gave the girl a few dollars.
b. My family was on the way to a restaurant.
c. My mom went home and brought some food.
d. We met with a girl and her mother asking for dollars.
| A．b, d, a, c |
| B．b, a, c, d |
| C．d, a, c, b |
| D．d, c, b, a |
| A．Patient. |
| B．Strict. |
| C．Proud. |
| D．Kind. |
8 . Oindrila Basu from India, 25, is a key member of a global forestry organization.
Back in her youth, she had to be taught the importance of nature. She used to ruin nests of the bulbul bird just for fun. Once, her mother caught her and forced her to find the eggs and replace the nest. With a heavy heart, the girl realized she had done something terrible.
This is just one way that Basu's parents shaped her understanding and appreciation of nature. Living in the countryside, she spent her youth studying ants before a rain, watching sunbirds drink bottlebrush nectar （花蜜），counting fireflies and watching seedlings grow. Then her parents decided to move to a nearby city with better educational opportunities and she stopped having firsthand experiences with nature.
As she struggled to choose a college major, her mother suggested a career in forestry. That's when her journey began and she fell in love with forestry. Away from the crowded concrete cities, in the lap of the Himalayas, she got her bachelor's degree in forestry from Kumaun University, India. When she went on to study for a master's in forestry from the Forest Research Institute, India, she finally got introduced to a like-minded group of people, dedicated to the same cause — the International Forestry Students' Association （（IFSA）.
IFSA is a global organization connecting students to exchange knowledge and participate in forestry activities. The youth joining IFSA are encouraged to undertake its task — to enrich forest education and spread a love for nature through events and intercultural exchanges.
After six months of exciting international conferences and workshops, Basu found her home — a family that loved forests as much as she did. She felt rejuvenated （重生的）;her passion had a direction. Now she wanted to do more.
Now with the IFSA , Basu recalled her experience of joining , " Consciously （有意识地）or subconsciously we chose forestry, or rather, forestry chose us".
1. Basu's parents play a role in her love for nature.| A．unique | B．usual | C．vague | D．vital |
| A．Basu's tutors | B．people who love forests |
| C．Basu's classmates | D．people who work for forest research |
| A．Love — Take — Study — Spread. |
| B．Hate — Destroy — Flee — Enrich. |
| C．Explore — Understand — Take — Devote. |
| D．Destroy — Experience — Love — Devote. |
| A．Loving Nature. |
| B．Basu: Forest Guardian Angel. |
| C．Realising Dreams. |
| D．Forestry: Home to Human Beings. |
9 . A team of researchers at Brigham and Women’s Hospital, Harvard Medical School, has developed a system to use a smartphone camera to test for viral infections. In their paper published in the journal Science Advances, the group describes their system, which involves the use of an external microchip device and a smartphone system that uses a trained deep-learning algorithm.
As the pandemic has gripped the world for most of this year, scientists have been looking for ways to slow the spread of the next one. In this new effort, the team has developed a smartphone-based system that can be used by non-medical people to test for a variety of viral infections.
The system is made up of a smartphone, an external microchip device and software. Body fluid samples are placed into a channel on the microchip device, which is then dipped in a small amount of H2O2. The resulting reaction leads to the formation of bubbles. The bubbles develop in unique patterns based in part on viruses in the fluid sample. The user points their smartphone camera at the bubbling sample and starts the deep-learning algorithm that has already been trained to identify the patterns and therefore recognize the presence of viruses. The whole process takes about 50 minutes. The researchers have thus far taught their system to recognize just three viruses, Zika and Hepatitis B and C. But testing shows the system to be 99% accurate. They note that their system is more portable and cost-effective than other solutions in the works.
The researchers suggest that their system could be rapidly trained to recognize new viruses if the need arises, and the microchip device could be sent to hot spots in the future. Such technology, the researchers suggest, could help to stop future pandemics if used widely. The researchers also note that the system could be immediately useful in infection prone areas lacking testing labs.
1. What’s the purpose of the text?| A．To advise people to use a new smartphone camera. |
| B．To introduce the development of deep-learning algorithm. |
| C．To explain the invention of a new microchip device. |
| D．To show a new finding about testing for viral infections. |
| A．To educate ordinary people with medical skills. |
| B．To help prevent the pandemic from spreading fast. |
| C．To try to treat an illness with a smartphone camera. |
| D．To make smartphones more portable and powerful. |
①Bubbles of a liquid sample are formed. ②Samples react with H2O2.
③Fluid samples are collected in a special device. ④Viruses in bubbles are recognized automatically.
⑤The software is started to examine the bubbles.
| A．③②①⑤④ | B．③①②④⑤ |
| C．②③①⑤④ | D．②①③④⑤ |
| A．Indifferent. | B．Doubtful. | C．Confident. | D．Curious. |
10 . An elm tree (榆树) was planted in the first half of the 20th century on a farm in Michigan, US.
In the 1950s, the family that owned the farm kept a bull chained to it. The bull walked around the tree. pulling a heavy iron chain, which made a grove (沟) in the tree about a meter off the ground. The groove deepened over the years, thought for whatever reason, it didn’t kill the tree.
After some years, the family sold the farm and took their bull with them. They cut the chain, leaving most of it hanging down from the tree. Eventually, bark (树皮) slowly covered the old chain.
Then one year later, disaster struck Michigan in the form of Dutch elm disease. It left a path of death across vast areas. All of the elms lining the road leading to the farm were infected and dies. Everyone figured that the old elm tree would be next. There was no way the tree could last, with its age and the chain hanging off its trunk.
The present owners considered pulling the chain out and chopping the tree up into firewood before it dies. But they simply couldn’t bring themselves to do it. It was as if the old tree had become a family friend, so they decided to let nature take its course. Amazingly, the tree didn’t die. Year after year, it grew stronger. Nobody could understand why it was the only elm still standing in the whole area.
Experts from Michigan University came to observe the tree later examining the scar left by the iron chain. The experts decided that it was actually the chain that saved the elm’s life. They reasoned that the tree must have absorbed so much iron from the chain that it became immune to Dutch elm disease.
It’s said that what doesn’t kill you will make you stronger. So if you’re ever in Michigan, look for that beautiful elm tree. Look for the wound made by the chain — it serves as a reminder that even with wounds, we can still have hope. Our wounds can give us the resources we need to cope and survive. They can truly make us strong.
1. What is the right order of the events related to the elm tree?a. The new owners left the elm tree as it was.
b. A farmer planted an elm tree on the farm.
c. A bull was chained to the elm tree by the owner.
d. The tree was left behind with most of the chain hanging down.
| A．c d b a | B．b d c a | C．b c d a | D．c b a d |
| A．A heavy iron chain gradually became part of it. |
| B．The scar in the tree was completely healed finally. |
| C．The tree was almost killed by the bull and its chain. |
| D．The tree grew stronger because of the owners’ care. |
| A．Its thicker bark protected it from the disease. |
| B．Infected trees near it were all chopped down. |
| C．It was saved by experts from Michigan University. |
| D．It got enough iron that sheltered it from the disease. |
| A．We should make use of what we have to overcome difficulties. |
| B．Something we consider a weakness can make us stronger. |
| C．Never give up hope on life even in hopeless situations. |
| D．Letting nature take its course is the best way to deal with problems. |
