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Read the article and select the best answer. Article: John Nash, a Nobel Prize winner and a mathematical genius whose struggle with mental illness was documented in the Oscar-winning film A Beautiful Mind, was killed in a car accident on May 24th, 2015. Born in West Virginia, Nash displayed a keenness for mathematics early in life,independently proving Femret's little theorem before graduating from high school. By the time he turned 30 in 1958,he was an unquestionable academic celebrity. At Princeton, Nash published a 27-page thesis that led to applications to economics, international politics, and evolutionary biology. His signature solution-known as a "Nash Equilibrium "-found that competition among two opponents,not necessarily governed by zero-sum logic. Two opponents can, for instance,each achieve their maximum objectives through cooperating with the other, or gain nothing at all by refusing to cooperate. It is now regarded e, one of the most important social science ideas in the 20th century. In the late 1950s, Nash began a slide into mental illness. By the time Nash was awarded the Nobel Prize in Economics in 1994, he hadn't published a paper in 36 years. But like a child cured of a nightmare by the switch of a light, Nash recovered from his illness seemingly by choosing not to be sick anymore. He continued to work, travel,and speak at conferences for the rest of his life. In 2001, the release of the film A Beautiful Mind,based an Sylvia Nasar's 1998 book of the same name, introduced Nash's unusual life story to an international audience. Question: John Nash passed away because of _ Options: A: a mental illness B: overwork C: a traffic accident D: starvation
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C

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Read the article and select the best answer. Article: Scientists from the Max Plank Institute for Biological Cybernetics in Tubingen, Germany, have presented the first experimental evidence that people do end up walking in circles if lost in unfamiliar areas.The study, published in the journal Current Biology, examined the tracks of people who walked for several hours in the Sahara desert in Tunisia and in the Bienwald forest in Germany.Researchers Jan Souman and Marc Ernst said the scientists used the global positioning system (GPS) to record these paths.The results showed that the walkers were only able to keep a straight line when the sun or moon was visible.As soon as the sun disappeared behind some clouds, people started to walk in circles without even noticing it. Souman said one explanation offered in the past for people walking in circles was that most people have one leg longer or stronger than the other, which would produce a systematic bias in one direction.To test .the researchers asked people to walk straight while blindfolded which removed the effects of vision.They found that these circles were rarely in a systematic direction, with the same person sometimes switching to the left and sometimes to the right. "Most of the participants in the study walked in circles, sometimes in extremely small ones.Walking in circles is therefore not caused by differences in leg length or strength, but more likely the result of increasing uncertainty about where straight ahead is," said Souman, "Small random errors in the various sensory signals that provide information about walking direction add up over time, making what a person perceives to be straight ahead drift away from the true straight ahead direction." Question: Why are the subjects required to be blindfolded? Options: A: To encourage them to walk straight. B: To stop them from seeing each other. C: To dismiss the effects of vision. D: To keep the test a top secret.
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C

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Read the article and select the best answer. Article: People smile at times. However, the meaning of a smile in different cultures may be different. Depending on different cultures, smiling can express joy and amusement, but it can also show embarrassment . People in the United States smile a lot. Every one smiles at each other in order to show they are open and friendly. However, in China, smiling is not only an expression of happiness, but also a way to avoid being embarrassed. Chinese people like smiling when they are embarrassed in order to avoid embarrassment. Smiling is a kind of good will but not sneer . For example: When a child falls down from a bike, the adults in China may smile, which is a kind of gentle encouragement and not a kind of impolite laugh. When a person from the United States might blush with embarrassment or become offensive , a Chinese might blush with smile. To avoid serious misunderstanding, people who engage in intercultural communication should be able to understand the meaning of smiling properly. Question: What is mainly talked about in the passage? Options: A: People smile at times. B: Smiling can express different feelings depending on different cultures. C: Americans are more open and friendly than Chinese people. D: The Chinese people often hide their true feelings.
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B