单选题Samantha is just as rich ______ David.

单选题Sally (must have called) her sister last night, but she (arrived) home (too late) to call (her).

单选题Like many of my generation, I have a weakness for hero worship. At some point, however, we aU to question our heroes and our need for them. This leads us to ask: What is a hero? Despite immense differences in cultures, heroes around the world generally share a number of characteristics that instruct and inspire people. A hero does something worth talking about. A hero has a story of adventure to tell and community who will listen. But a few heroes beyond mere fame. Heroes serve powers or principles larger than themselves. Like high-voltage transformers, heroes take the energy of higher powers and step it down so that it can be used by ordinary The hero lives a life worthy of imitation. Those who imitate a genuine, hero experience life with new depth, enthusiasm, and meaning. A sure test for would-be heroes is what or whom do they serve? What are they willing to live and die for? If the answer or evidence suggests they serve only their own fame, they may be famous persons but not heroes. Madonna and Michael Jackson are famous, but who would claim that their fans find life more abundant? Heroes are catalysts (催化剂) for change. They have a vision from the mountaintop. They have the skill and the charm to move the masses. They create new possibilities. Without Gandhi, India might still be part of the British Empire. Without Rosa Parks and Martin Luther King, Jr., we might still have segregated (隔离的) buses, restaurants, and parks: It may be possible for largescale change to occur without leaders with magnetic personalities, but the pace of change would be slow, the vision uncertain, and the committee meetings endless.

单选题Recently I stood in front of my class, observing an all-too-familiar scene. Most of my students were secretly—or so they thought—looking at their smart phones under their desks. As I called their attention, students" heads slowly lifted, their eyes reluctantly glancing forward. I then cheerfully explained that their next project would practice a skill they all desperately needed: holding a conversation. Several students looked confused. Others moved uneasily in their seats, waiting for me to stop watching the class so they could return to their phones. Even with plenty of practice, most kids were unable to converse effectively. They looked down at their hands. Some even reached for their phone—the last thing they should be doing. As I watched my class struggle, I came to realize that conversational competence might be the single-most overlooked skill we fail to teach students. Kids spend hours each day engaging with ideas and one another through screens--but rarely do they have an opportunity to truly practice their interpersonal communication skills. Admittedly, teenage awkwardness and nerves play a role in difficult conversations. But students, reliance on screens for communication is affecting their engagement in real-time talk. It might sound like a funny question, but we need to ask ourselves: Is there any 21st century skill more important than being able to hold a confident, coherent (连贯的) conversation? When students apply for colleges and jobs, they won"t conduct interviews through their smart phones. When they negotiate pay raises and discuss projects with employers, they should demonstrate a thoughtful presence and the ability to think on their feet. But in our rush to meet 21st—century demands，we aren’t asking students to think and communicate in real time. Online discussion boards and Twitter are useful tools for exchanging ideas. But they often encourage a "read, reflect, forget about it" response that doesn"t truly engage students in extended critical thinking or conversation. As Sherry Turkle writes, "We are tempted to think that our little "sips" of online connection add up to a big gulp (大口) of real conversation. But they don"t."

单选题Very soon a computer will be able to teach you English. It will also be able to translate any language for you too. It"s just one more incredible result of the development of microprocessors-those tiny parts of a computer commonly known as "silicon chips". So give up going to classes, stop buying more textbooks and relax. In a couple of years you won"t need the international language of English. Already Texas instruments in the United States are developing an electronic translation machine. Imagine a Spanish secretary, for example, who wants to type a letter from the boss to a business man in Sweden. All he or she will have to do is this: first type the letter will appear on another television screen in Stockholm in perfect Swedish. And that"s not all. Soon a computer will be able to teach you English, if you really want to learn the language. You"ll sit in front of a television screen and practice endless structures. The computer will tell you when you are correct and when you are wrong. It will even talk to you because the silicon chips can change electrical impulses into sounds. And clever programmers can predict the responses you, the learner, are likely to make. So think of it. You will be able to teach yourself at your own pace. You will waste very little time, and you can work at home. And if after all that, you still can"t speak English you can always use the translating machine. In a few years, therefore, perhaps there will be no need for BBC Modern English, or BBC English by Radio programs—no more textbooks or teachers of English. Instead of buying an exciting new textbook, the computer will ask you to replace it with microprocessor one thousand nine hundred and eighty-four. Fast, reliable and efficient language learning and translating facilities will be available to you. Think of that no more tears or embarrassing moments. One little problem is that a computer can"t laugh yet-but the scientists are working on it. Happy learning!

单选题What's the chance______five heads when you toss a coin five times?

单选题 Experts predict that China's healthcare market will have an annual growth of 6 to 8 per cent in the next few years, making it one of the potentially most prosperous. In Shanghai, annual medical expenditure is estimated to be 16 billion yuan (U. S. 93 billion). With an increasingly{{U}} (31) {{/U}}population, the growing consumption power and longer life{{U}} (32) {{/U}}of local residents, the medical market has great opportunities. However, limited medical resources cannot meet people's needs{{U}} (33) {{/U}}financial deficits in State-owned hospitals. {{U}}(34) {{/U}}, there is room for a range of different medical organizations. As is the case with many State-owned enterprises, public hospitals in the past half century have learned a lot of bad habits: {{U}}(35) {{/U}}management, over-staffing and bureaucratic operating procedures. Being a member of World Trade Organization (WTO), China has to{{U}} (36) {{/U}}its promise to open the health industry to foreign capital in coming years. By then, public hospitals will be facing fierce competition from Western giants they have never prepared for. So it's quite urgent{{U}} (37) {{/U}}them to learn how to operate as an enterprise and how to survive in the competitive market economy of the future. As a{{U}} (38) {{/U}}, the healthcare sector was first opened to domestic private investors. Since the first private hospital opened in 1999, private investors from Shenzhen, Sichuan and Zhejiang provinces have been scrambling to enter Shanghai. {{U}}(39) {{/U}}show that about 20 private hospitals have been set up in the city, although this number, {{U}}(40) {{/U}}with more than 500 public hospitals, is still quite low.

单选题I am firmly______that this plan would do much good to our company.

单选题Wealthy nations have fallen far behind on their aid ______ to the world's poor. A. commitments B. engagements C. responsibilities D. applications

单选题We all know that every culture has its own ideal of behavior, and the United States is no ______. A. expectation B. exclusion C. expectancy D. exception

单选题It seems that the author of the passage ______ what Dr. Cotes says in the book "The Privileged Ones".

单选题He took her hand and felt the scar on her thumb, ______of an accident with a kitchen knife in the early days of their marriage.

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单选题The sign reads "in case of ______ fire, break the glass and push red button." A. /, a B. /, the C. the, the D. a, a

单选题Famed singerSteve Wonder can't see his fans dancing at his concerts. He can't see the hands of his audience as they applaud wildly at the end of his Superstition. Blind from birth, Wonder has waited his whole life for a chance to see. Recently, Wonder visited Mark Humayan, a vision specialist. He thought that a new device currently being studied by Humayan might offer him that chance. The device, a retinal prosthesis, is a tiny computer chip implanted inside a patient's eye. The chip sends images to the brain and allows some sightless people to see shapes and colors. Wonder hoped the retinal prosthesis might work for him. "I've always said that if ever there's possibility of my seeing," said Wonder, "then I would take the challenge." Unfortunately for Wonder, that challenge will have to wait. Humayan explained that the device isn't ready for people who have been blind since birth. Their brains may not be able to handle signals from a retinal prosthesis because their brains have never handled signals from a healthy eye. However the retinal prosthesis and other devices show great promise in helping many other sightless people who once had vision see again. Perhaps one day soon, some formerly sightless people may be in Wonder's audience looking up—and seeing him—for the very first time. Wonder's willingness to take part in retinal prosthesis studies and the results of those studies are giving new hope to people who thought they would be blind for the rest of their lives. More than one million people in the United States are considered legally blind, meaning that their eye- sight is severely impaired. Another one million are totally blind. Two types of specialized cells in the retina—rods and cones—are critical for proper vision. Light enters the eye and falls on the rods and cones in the retina. Those cells convert the light to electrical signals, which travel through the optic nerve to the brain. The brain interprets those signals as visual images. Rods detect light at low levels of illumination. For instance, rods allow you to see faint shadows in dim moonlight. Cones, on the other hand, are most sensitive to color. Some diseases can damage cells in the retina. For instance, macular degeneration causes blind ness and other vision problems in 700,000 people in the United States each year. The condition i caused by a lack of adequate blood supply to the central part of the retina. Without blood, the rods, cones, and other cells in the retina die. Devices such as the retinal prosthesis won't prevent or cure our eye diseases, but they ma help patients who have eye disorders regain some of their vision. Different forms of retinal presto sis are currently being developed. On one type, a tiny computer chip is embedded in the eye The chip has a grid of about 2,500 light-sensing elements called pixels. Light entering the eye strikes the pixels, which convert the light into electrical signals. The pixels then send the electrical signals to nerve cells, behind the retina. Those cells send signals vi the optic nerve to the brain for interpretation. Many people who have had a retinal prosthesis implanted say they can see shapes, colors and movements that they couldn't see before. "It was great," said Harold Churchey, who n ceived his retinal prosthesis 15 years after he became totally blind. "To see light after so long—was just wonderful. It was just like switching a light on./

单选题______, I seated him in an armchair.

单选题One of V. S. Naipaul" s best-known nonfictional works is______.