A 33-year-old financial analyst in California recently quit his job to devote himself to an unpaid job teaching math on the Internet, and his lessons are reaching almost 100,000 people a month. Salman Khan’s voice is heard every day on the net --- by tens of thousands of students around the world who are hungry for help learning math. He has posted 1,200 lessons on YouTube ... lessons that appear on an electronic blackboard, which range from basic addition to advanced mathematics for science and finance. And they are free.
Khan lives in Silicon Valley, with his wife, a doctor, and their new baby. He got the idea for his “Khan Academy” four years ago, when he taught a young cousin how to convert kilograms to grams. With Khan’s help, the cousin got good at math, and Khan began a new career.
Now, Khan records his lessons himself, but he never goes on camera. “It feels like my voice in their head. You’re looking at it and it feels like someone’s over your shoulder talking in your ear, as opposed to someone at the blackboard, which is distant from you,” he said.
When Springfield High School in Palo Alto, California invited Khan to speak in person --- he immediately connected to the students there.
The idea of short lessons that can be played over and over again attracted high school senior Bridget Meaney. She says she had trouble with math in the seventh grade. “I think the teachers are good, but they can’t teach at a speed that’s perfect for everyone,” she said. “I like the idea of learning something in class but then going back and pressing pause or rewind and actually getting a deeper understanding of it.”
Originally, Khan kept his lessons short because of YouTube restrictions. Now, he thinks short is better. “Education researchers now tell me that 10 minutes is how long someone can have a high level of concentration. And anything beyond that and your brain switches off,” he said.
For Khan, teaching math, science, and finance is just the beginning. He says he’s ready to expand his YouTube site to include other subjects as well.What gave Khan the idea of teaching math online?
| A．His success in helping his cousin learn math. |
| B．His discovery that many students found learning math difficult. |
| C．A suggestion made to him at a local high school. |
| D．His interest in Internet teaching. |
Why does Khan never go on camera?
| A．He’s too shy to show his face on camera. |
| B．It’s restricted by YouTube for education videos. |
| C．He wants to keep distance from the viewers. |
| D．He wants to create a more relaxed learning atmosphere. |
From the passage, we know that ________.
| A．Khan travels to many schools to promote his lessons |
| B．Khan plans to include more subjects in the future |
| C．Khan gives live math lessons every day for free |
| D．Khan set up the Khan Academy with his wife |
Why does Bridget Meaney like Khan’s lessons?
| A．Khan teaches seventh grade math better than her teacher. |
| B．The lessons can be watched repeatedly until fully understood. |
| C．She can perfectly follow the pace of Khan’s teaching. |
| D．She cannot concentrate when learning in class. |
What does Khan mean by “short is better” in the 6th paragraph?
| A．Keeping the lessons short can ensure better concentration. |
| B．YouTube recommends short lessons for its site. |
| C．Short lessons encourage students to return to the website. |
| D．Students enjoy short mathematics lessons more. |
It’s the place where smart people make smart machines work even smarter. It’s also in the heart of sunny California, a great place to start a family and raise kids. What could be better?
But something is happening to their children. Up until the age of two they develop normally. But then everything seems to go backwards. The children become locked into their own small world, unable to communicate at all.
They call it the “curse(诅咒)of Silicon Valley,” but the medical name for the condition is autism(自闭症). It used to be thought that autism was a kind of mental illness. Now doctors are sure that it is a neurological disease transmitted genetically. It seems that the people leading the communications revolution are having children who cannot communicate at all.
But even the parents have trouble communicating. Asperger’s Syndrome is a mild version of autism. People who have it are highly intelligent and often brilliant with numbers or system but have no social skill. This very combination of symptoms makes Asperger’s sufferers into ideal computer professionals.
The Asperger’s sufferer has always been a well-known figure in popular culture. He or she was the eccentric but dedicated scholar or the strange uncle or auntie who never married. But the high numbers of such people in Silicon Valley mean that they can meet others who understand them and share their interests. And while they might not be personally attractive, they can earn truly attractive amounts of money. They can get married and have kids. Unfortunately, many of the children of two Asperger’s parents seem to be developing serious autism.
There is little anyone can do. It takes hours of work just to make autistic child realize that anyone else exists. And there is no cure in sight. Some argue that no cure should be found. “It may be that autistics are essentially different from normal people, but that these differences make them invaluable for the evolution of the human race,” says Dr. Kirk Whilhelmsen of the University of California. “To eliminate the genes for autism could be disastrous. ”
It seems that the children of Silicon Valley are paying the price of genius.What is the best title of the passage?
| A．The Price of Genius |
| B．Asperger’s Syndrome, a Mild Version of Autism |
| C．No Cure Should Be Found |
| D．Ideal Computer Professionals |
What does Dr Kirk Whilhelmsen think of autism?
| A．It is disastrous to society. |
| B．It is not completely a bad thing. |
| C．It is a punishment to those working in Silicon Valley. |
| D．People with autism should never marry. |
What can we learn about autism according to the passage?
| A．It is believed to be a kind of mental illness that can be cured. |
| B．People with autism can’t find people sharing their interests. |
| C．They do not care about the presence of others. |
| D．They are a burden for the society. |
Why do people call autism “curse of Silicon Valley”？
| A．Because autistic people live in Silicon Valley. |
| B．Because many people working in Silicon Valley have autism children. |
| C．Because people with autism will be driven out of Silicon Valley. |
| D．Because people with autism are not personally attractive and not liked by others. |
What can we know about Asperger’s Syndrome according to the passage?
| A．Asperger’s sufferers are ideal computer professionals. |
| B．Asperger’s sufferers never get married and have children. |
| C．Asperger’s sufferers are ashamed of themselves and locked into their own world. |
| D．Asperger’s sufferers can be beneficial to society if they are cured. |
Samuel Osmond is a 19-year-old law student from Cornwall, England. He never studied the piano. However, he can play very difficult musical pieces by musicians such as Chopin and Beethoven just a few minutes after he hears them. He learns a piece of music by listening to it in parts. Then he thinks about the notes in his head. Two years ago, he played his first piece Moonlight Sonata(奏鸣曲)by Beethoven. He surprised everyone around him.
Amazed that he remembered this long and difficult piece of music and played it perfectly, his teachers say Samuel is unbelievable. They say his ability is very rare, but Samuel doesn’t even realize that what he can do is special. Samuel wanted to become a lawyer as it was the wish of his parents, but music teachers told him he should study music instead. Now, he studies law and music.
Samuel can’t understand why everyone is so surprised. “I grew up with music. My mother played the piano and my father played the guitar. About two years ago, I suddenly decided to start playing the piano, without being able to read music and without having any lessons. It comes easily to me ---I hear the notes and can bear them in mind---each and every note,” says Samuel.
Recently, Samuel performed a piece during a special event at his college. The piece had more than a thousand notes. The audience was impressed by his amazing performance. He is now learning a piece that is so difficult that many professional pianists can’t play it. Samuel says confidently,” It’s all about super memory---I guess I have that gift.”
However, Samuel’s ability to remember things doesn’t stop with music. His family says that even when he was a young boy, Samuel heard someone read a story, and then he could retell the story word for word.
Samuel is still only a teenager. He doesn’t know what he wants to do in the future. For now, he is just happy to play beautiful music and continue his studies.What is special about Samuel Osmond?
| A．He has a gift for writing music. |
| B．He can write down the note he hears. |
| C．He is a top student at the law school. |
| D．He can play the musical piece he hears. |
What can we learn from Paragraph 2?
| A．Samuel chose law against the wish of his parents. |
| B．Samuel planned to be a lawyer rather than a musician. |
| C．Samuel thinks of himself as a man of great musical ability. |
| D．Samuel studies law and music on the advice of his teachers. |
Everyone around Samuel was surprised because he _________.
| A．received a good early education in music |
| B．played the guitar and the piano perfectly |
| C．could play the piano without reading music |
| D．could play the guitar better than his father |
What can we infer about Samuel in Paragraph 4?
| A．He became famous during a special event at his college. |
| B．He is proud of his ability to remember things accurately. |
| C．He plays the piano better than many professional pianists. |
| D．He impressed the audience by playing all the musical pieces. |
Which of the following is the best title of the passage?
| A．The Qualities of a Musician |
| B．The Story of a Musical Talent |
| C．The Importance of Early Education |
| D．The Relationship between Memory and Music. |
People without homes have always been present in America. In the past，they were called hobos，bums，or drifters. It was not until the early 1980s that these people received a new name，when activists named them the homeless.
The types of people who were homeless also changed in the 1980s. No longer were they primarily older men. They were younger，with an average age of 35. Their numbers consisted of women，children，adolescents and entire families. They were of many races and cultures. No longer were they only in the inner city. They lived in rural areas and in large and small cities. No longer were they invisible to the people with homes and jobs. The homeless of the 1980s lived in packing crates (装货箱) and doorways. They slept on sidewalks and in public parks. They begged money from passersby.
Counting the numbers of homeless people is difficult. However，in 1984 the Department of Housing and Urban Development estimated the homeless population at between 250,000 and 350,000. In 1990 the Census Bureau counted about 459,000 people in shelters，in cheap hotels，and on the streets. In 1995 the National Alliance to End Homelessness estimated that there were 750,000 homeless Americans.
The homeless of the 1980s also began to speak out for themselves. Some spoke to Congress and to government committees controlling funding for social programs. Street newspapers，such as Chicago’s Streetwise and Boston’s Spare Change，had stories，poems，and essays that expressed the homeless viewpoint. The visible and vocal presence of the homeless prompted help from volunteers and government agencies. But what is still needed is a solution to the plight of America’s homeless population.This passage is mainly about________.
| A．one homeless person’s story |
| B．the history of the homeless |
| C．the changes of the homeless in the late 20th century |
| D．a way to provide homes for the homeless |
How did the homeless speak out about their problems?
| A．By writing books. |
| B．By moving to rural areas. |
| C．By being elected to the government committees. |
| D．By expressing their viewpoints in street newspapers. |
Who is responsible to get the number of the homeless population according to the passage?
| A．Government agencies. |
| B．Street newspapers. |
| C．The homeless themselves. |
| D．The volunteers. |
The underlined word “plight” in the last paragraph means “______”.
| A．income | B．flight |
| C．difficulty | D．employment |
Which of the following is TRUE according to the passage?
| A．The homeless all lived in urban cities in America. |
| B．The name “the homeless” was given in the early 1980. |
| C．Not only the disabled belong to the homeless family. |
| D．There were about 800,000 homeless people in western countries. |
Around the world, honeybee groups are dying in huge numbers: About one-third of nests collapse each year. For bees and the plants they pollinate (授粉) — as well as for beekeepers, farmers, honey lovers and everyone else who appreciates this marvelous social insect — this is a catastrophe.
Honeybee collapse has been particularly worrying because there is no one cause, but rather a thousand little cuts. The main elements include the mixed impact of pesticides (杀虫剂) applied to fields, as well as pesticides applied directly into nets to control bugs, pests and diseases; nutritional shortages caused by vast acreages of single-crop fields that lack diverse flowering plants; and commercial beekeeping itself, which destroys groups by moving most bees around the country multiple times each year to pollinate crops.
The real issue, though, is not the volume of problems, but the interactions among them. Here we find a major lesson from the bees that we ignore at our risk: the concept of synergy (协同作用), where one plus one equals three, or four, or more. A typical honeybee colony contains remains from more than 120 pesticides. Alone, each represents a benign dose (良性剂量). But together they form a poisonous soup of chemicals whose interplay (相互作用) can greatly reduce the effectiveness of bees’ immune systems, making them easier to suffer from diseases.
Observing the death of honeybees should warn us that our own well-being might be similarly threatened, and the widespread collapse of so many groups presents a clear message: We must demand that our regulatory authorities require studies on how exposure to low dosages of combined chemicals may affect human health before approving compounds.
Bees also provide some clues to how we may build a more collaborative relationship with the services that ecosystems can provide. Bees could offer some of the pollination service needed for agriculture. People discovered that crop harvests, and thus profits, are maximized if some cropland are left uncultivated for bees. Meanwhile a variety of wild plants means a healthier, more diverse bee population, which will then move to the planted fields next door in larger and more active numbers.Which of the following is NOT the cause that leads to bees dying?
| A．Lack of nutrition from enough diverse flowering plants. |
| B．The pests and diseases of the bees. |
| C．The beekeepers’ destroying without intention |
| D．The pesticides applied to crops. |
By saying “one plus one equals three, or four, or more” in Paragraph 3, the author means that ____.
| A．bees united mean they are much more powerful |
| B．bees united mean they are much more poisonous |
| C．pesticides mixed mean they are much more poisonous. |
| D．pesticides mixed mean they are much more effective. |
The lesson people can learn from bees dying is that ____________.
| A．medicine is as powerful as pesticide |
| B．our health might be threatened by pesticides |
| C．we should protect bees by reducing the usage of pesticides |
| D．medicine may be harmful to us when used together |
What is the last paragraph mainly about?
| A．Keeping a balance with nature is important |
| B．More plants mean more and healthier bees. |
| C．Bees are very important to agriculture. |
| D．Bees can bring in good higher profits to farmers |
There is a very instructive incident involving the life of Alexander, the great Greek king. Alexander, after conquering many kingdoms, was returning home. On the way, he fell ill and it took him to his death bed. With death staring him in his face, Alexander realized how his conquests, his great army, his sharp sword and all his wealth were of no consequence. So, he lay helplessly waiting to breathe his last. He called his generals and said, "I will depart from this world soon, I have three wishes, please carry them out without fail."
"My first desire is that," said Alexander, "My physicians alone must carry my coffin." After a pause, he continued, "Secondly, I desire that when my coffin is being carried to the grave, the path leading to the graveyard be strewn（撒满） with gold, silver and precious stones which I have collected." The king continued， "My third and last wish is that both my hands be kept hanging out of my coffin.” Alexander's favorite general kissed his hand and pressed them to his heart. "Oh King, we assure you that your wishes will all be fulfilled. But tell us why do you make such strange wishes?"
At this Alexander took a deep breath and said, “I would like the world to know of the three lessons I have just learnt. I want my physicians to carry my coffin because people should realize that no doctor can really cure any body. They are powerless and cannot save a person from the clutches of death. So let people not take life for granted.
The second wish of strewing gold, silver and other riches on the way to the graveyard is to tell people that not even a bit of gold will come with me. I spent all my life earning riches but cannot take anything with me. Let people realize that it is just a waste of time to chase wealth.
And about my third wish of having my hands hanging out of the coffin, I wish people to know that I came empty-handed into this world and empty-handed I go out of this world.” With these words, the king closed his eyes. Soon he let death conquer him and breathed his last.The first paragraph suggests that Alexander _________.
| A．was conquering many kingdoms. |
| B．realized that what he got in his life was nothing to him at all. |
| C．wanted to leave as he came empty-handed. |
| D．regarded his conquests, his great army, his sharp sword and all his wealth as the most important things. |
The underlined word “clutches” in paragraph 3 means “_______”.
| A．sentence | B．attention |
| C．control | D．shadow |
The author intends to ________.
| A．tell us the story of Alexander |
| B．introduce readers to the instructive lessons of Alexander |
| C．stress the powers of Alexander the Great |
| D．persuade people to realize what Alexander said |
What would be the best title for the passage?
| A．The Death of Alexander. |
| B．The Greed of Alexander |
| C．Three Wishes of Alexander |
| D．The Life of Alexander |