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 . Feel like a family day trip outside London? Here are some of the best choices.
Harry Potter Studio
The Harry Potter Studio tour is one of the easiest day trips from London. Just read the directions on the website where you buy tickets and follow the crowds from the train to the bus. It is a unique experience. A walk through the studio allows families to appreciate every little detail that was put into the production of the Harry Potter movies from the costumes to the sets. Visitors can view the Potions Classroom, board the Hogwarts’ Express, and walk through the Dursley’s house.
Leeds Castle
Leeds Castle is one of the most beautiful castles in the UK. It is surrounded by a river and gardens, making it a relaxing and peaceful place. Leeds Castle is open for self-guided tours, and there are kid-friendly shows. Leeds Castle has a wonderfully-designed maze (迷宫), which has a surprise at the center that will appeal to all ages, not just children looking for a place to play. Leeds Castle also has a big playground, one part of which is set aside for small kids while the other inspires teenagers in an old game of hide-and-seek.
Windsor Castle
Windsor Castle is used by the current British royal family. This makes it the longest-occupied palace in Europe. Afraid that your young children might feel dull? Don’t worry. There is a kids’ audio tour available as well as an activity that features crafts (手工艺), coloring and dress-up for little ones. And in the summer months, parents will be happy to know that there is a place to get an ice cream for their kids centrally located in the castle complex (建筑群).
1. What can visitors do on the Harry Potter Studio tour?| A．Buy some costumes. |
| B．Ride on a special train. |
| C．See Harry Potter movies. |
| D．Study in the Potions Classroom. |
| A．Visitors must go on a tour with a guide. |
| B．The gardens are meant for hide-and-seek. |
| C．Kids can have a fun time on the playground. |
| D．The maze is especially popular among grown-ups. |
| A．Tiresome. | B．Comfortable. |
| C．Adventurous. | D．Interesting. |
3 . As I drove along the road, small car flew across the center divider from the opposite direction and crashed into my car head-on. I fell unconscious and was awakened by the ringing of my mobile phone.
I was brought to Kuala Lumpur General Hospital bleeding on from my nose, mouth and legs. But the hospital staff was too busy to attend to me, so I called a friend to tell him about the accident. Some friends arrived very soon and sent me to a private hospital nearby. I saw my injured feet hanging from my body, blue and lifeless, and I begged the doctors to save them at all cost. They calmly promised to do their best.
The doctors made it. After I was discharged, I was given ten months medical leave. My heart sank, knowing that it meant I, a big man, couldn't work. How was I going to support my 65-year-old mother and other family members? I felt completely helpless, but a la of unexpected blessings came my way. When I was recovering at home, friends and relatives helped me with my banking, insurance or simply came to cheer me up.
When the casts（石膏）were removed, I did not let the sight of my weak legs discourage me. I worked hard at my physiotherapy（物理疗法）with only one aim. After eight months, I was walking without the aid of a walking stick. Oh February the following year, I returned to my job again. Today, after eight years, I have travelled to many counties as a tour leader.
The accident makes me realize how lives can change in a second. I value life more, not only of my own but also of everyone I know, and I will always try to help when I know of someone in trouble.
1. What made the author come back to life in the traffic accident?| A．Someone made a call to him. |
| B．A car crashed into his ear head-on. |
| C．One of his friends gave him first aid. |
| D．His mobile phone was out of order suddenly. |
| A．Was inspired. | B．Got injured. |
| C．Was discovered. | D．Left hospital. |
| A．He is honest and strong. | B．He is learned and intelligent. |
| C．He is optimistic and determined. | D．He is discouraged and desperate. |
| A．Life is very precious to people. | B．It's a hard job to be a tour guide. |
| C．Many people are in trouble in life. | D．It's a must for someone to help others. |
4 . You should try your best to create your own family library so that you and your family are always learning. "It is a great mistake to think that education is finished when young people leave school. Education is never finished even if you grow older," said Mrs Child in The Mother's Book. "Collecting a library of books in your home is really helpful to your family. ”
"What is really interesting about having so many books in your home is that a book you purchase has a chapter about the deeper knowledge of your favorite subject at school," said a university graduate. Researchers in a study tries to identify what parents do has an influence on how well their children do on standardized tests. One positive aspect they find is the availability of a large number of books at home. This has a stronger connection, especially when you read to your children every day. The more books your older kids have access to at home, the more likely they are just to be reading for fun, rather than having to wait for weekly trips to the library.
John Henry, one educated parent, said, "I have been homeschooling my children using the philosophy of A Thomas Jeffer son Education. This philosophy of learning is based on the reading of classic books. ” Clinton Fadiman said, "When you reread a classic, you do not see more in the book than you did before； you see more in you than before. " Classic books also make you smarter and wiser! The wisdom comes in the examples in the lives of the characters.
"It is within your power to guide your youth in their reading and to cultivate in their hearts a desire for good books. It is the most unfortunate if a person is not possessed with the desire for good reading. The reading habit, like charity, should begin at home," said Mrs Child.
1. What does the author mainly want to show in paragraph 2?| A．Kids don't need to go to the library any longer. |
| B．Parents should set a good example at home. |
| C．It's necessary to create a family library. |
| D．It's important to let kids pass standardized tests. |
| A．By quoting others ’words. | B．By questioning. |
| C．By imagination. | D．By analyzing research data. |
| A．East or west, home is best. |
| B．One is never too old to learn. |
| C．He who makes no mistakes makes nothing. |
| D．Charity is the soul, rather than the virtues of hand. |
| A．Where to Store Your Favorite Books at Home? |
| B．When to Read the Classic Books to Your Children? |
| C．Which Is Better, a Home Library or a Public Library? |
| D．Why Not Have Your Own Library of Books at Home? |
5 . It’s 3 o'clock and you’ve been hard at work. As you sit at your desk, a strong desire (欲望) for chocolate overcomes you. You try to busy yourself to make it go away. But it doesn’t. Here is another situation. Perhaps you are not feeling well. The only thing you want to eat is a big bowl of chicken soup, like your mom used to make when you were sick as a child. Food cravings are a strong desire for a specific type of food. And they are normal.
Scientists at the website How Stuff Works compare hunger and cravings this way. Hunger is a fairly simple connection between the stomach and the brain. They even call it simply “stomach hunger.” When our stomachs burn up all of the food we have eaten, a hormone (荷尔蒙) sends a message to one part of the brain for more food, which controls our most basic body functions such as thirst, hunger and sleep. The brain then produces a chemical to start the appetite (食欲) and you eat. Hunger is a function of survival.
A craving is more complex. It activates (刺激) brain areas related to emotion, memory and reward. These are the same areas of the brain activated during drug-craving studies. Because of this, some scientists call food cravings “mind hunger.” People often crave foods that are high in fat and sugar. Foods that are high in fat or high in sugar produce chemicals in the brain. These chemicals give us feelings of pleasure.
In a 2007 study, researchers at Cambridge University found that “dieting or controlled eating generally increases the possibility of food craving.” So, the more you refuse yourself a food that you want, the more you may crave it. However, fasting is a bit different. They found that eating no food at all for a short period of time reduced food cravings.
So, the next time you crave something very special, know that it’s the fault of your brain, instead of your stomach.
1. The author describes two situations in the first paragraph to ________.| A．deepen the understanding of hunger | B．report the discovery of craving study |
| C．introduce the topic of the whole passage | D．remind readers of their own special food |
| A．It shows food is connected with emotion. | B．It makes sure that a person survives hunger. |
| C．It means the stomach functions well. | D．It proves the brain decides your appetite. |
| A．The drop of chemicals. | B．The increase of food desire. |
| C．The refusal of fat and sugar. | D．The disappearance of appetite. |
| A．Education. | B．Entertainment. |
| C．Science. | D．Economy. |
6 . I began working in journalism when I was eight.It was my mother's idea.She wanted me to “make something” of myself,and decided I had better start young if I was to have any chance of keeping up with the competition.
With my load of magazines I headed toward Belleville Avenue.The crowds were there.There were two gas stations on the corner of Belleville and Union.For several hours I made myself highly visible,making sure everyone could see me and the heavy black letters on the bag that said THE SATURDAY EVENING POST.When it was supper time,I walked back home.
“How many did you sell, my boy?” my mother asked. “None.”
“Where did you go?”
“The corner of Belleville and Union Avenues.” “What did you do?”
“Stood on the corner waiting for somebody to buy a Saturday Evening Post.” “You just stood there? Didn't sell a single one? My God,Russell.”
Uncle Allen put in, “I've decided to take the Post.” I handed him a copy and he paid me a nickle(五分镍币)．It was the first nickle I earned.
Afterwards my mother taught me how to be a salesman. I would have to ring doorbells, address adults with self-confidence,and persuade them by saying that no one, no matter how poor, could afford to be without the Saturday Evening Post in the home.
One day,I told my mother I'd changed my mind.I didn't want to make a success in the magazine business.
“If you think you can change your mind like this,” she replied, “you'll become a good-for-nothing.” She insisted that,as soon as school was over, I should start ringing doorbells, selling magazines.Whenever I said no, she would scold me.
My mother and I had fought this battle almost as long as I could remember.My mother, dissatisfied with my father's plain workman's life, determined that I would not grow up like him and his people.But never did she expect that, forty years later, such a successful journalist as me would go back to her husband's people for true life and love.
1. Why did the boy start his job young?| A．He wanted to be famous in the future. | B．The job was quite easy for him. |
| C．His mother had great hope for him. | D．The competition for the job was fierce. |
| A．excited | B．interested |
| C．ashamed | D．disappointed |
| A．She forced him to continue. |
| B．She punished him. |
| C．She gave him some money. |
| D．She changed her plan. |
| A．the war between the boy's parents |
| B．the arguing between the boy and his mother |
| C．the quarrel between the boy and his customers |
| D．the fight between the boy and his father |
7 . Did you ever have to say “no” to somebody? Such as a classmate who asks to go to lunch with you? New research suggests that, at least socially, a rejection (拒绝) should not include an apology. In other words, saying you are sorry does not make the person being rejected feel any better. In fact, it might make the rejected person feel worse. That is surprising. Many people consider it to be good manners to say they are sorry when they turn down a request.
Gili Freedman is doing some related research at Dartmouth College. For her research, she asked over 1,000 people to respond to different examples of social rejection. In one example, the researchers asked people for their reaction (反应）after a person named Taylor asked to join a co-worker who went out to lunch every Friday. And Taylor was told “no”. But in some cases, the person rejecting Taylor offered an apology. In other cases, the people doing the rejection did not say they were sorry. People were asked how they would feel if they were being turned down, just as Taylor was. Most said they would be more hurt by a rejection with an apology than a rejection without an apology.
Freedman said the reason is that apologies make people feel like they need to say that the rejection was okay— even when they felt like it was not okay. Rejection without an apology lets them express their feelings of disappointment, hurt or anger more easily. Freedman also said that an apology often makes the person doing the rejection feel better—even as it makes the person being rejected feel worse.
Her research deals only with social communication. A business situation might be very different. “If a manager rejects a job interviewee or a boss must tell an employee that he or she is being fired from a job,” Freedman said, “reactions to apologies may be different.”
1. Why do people say they are sorry when they express rejection?| A．Because they think it is more polite. |
| B．Because they think it helps them express their dislike better. |
| C．Because they think apologies are the basis of communication. |
| D．Because they think it sounds more comfortable for the listener. |
| A．rejected others without an apology |
| B．offered an apology when rejecting others |
| C．would be more hurt by a rejection with an apology |
| D．were asked to answer the question in different situations |
| A．It makes the rejection more acceptable. |
| B．It makes a good impression on the listener. |
| C．It makes the communication more pleasant. |
| D．It makes the person doing the rejecting feel better. |
| A．The effect of an apology during a rejection. |
| B．Gili Freedman’s research on business situations. |
| C．A rejection with an apology in a business situation. |
| D．The difference between a social situation and a business one. |
