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Read the article and select the best answer. Article: You can not see any object unless light from that object gets into your eyes. Some of the things you see give off light of their own. The sun, the stars, a lighted lamp are examples that can be seen by their own light. Such things are _ . Most of the things you see are not giving off light of their own. They are simply reflecting light that falls on them from the sun or some other luminous bodies. The moon, for example, does not give off any light of its own. It is non-luminous. You see it because sunlight falls on it and some of it reflects in our direction. So moon light is only second hand sunlight. When you look at a book, it sends to your eyes some of the light which falls on it, and you see the book. If light could be kept out from where you are so that there would be no light for the book to reflect, then you could not see the book even with your eyes wide open. Light travels so fast that the time in which it travels from the book you are reading to your eyes is so short as if there were no time at all. Light reaches us from the moon, which is about 380 000 kilometers away, in only a little more than a second. Question: _ have light of their own. Options: A: The sun and the moon B: The stars and the earth C: The sun and the stars D: The moon and the earth
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C

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Read the article and select the best answer. Article: LOS ANGELES--The advice offered from any other 82-year-olds might have made young people yawn and roll their eyes. But when former South African President Nelson Mandela advised two dozenprefix = st1 /Los Angelesto take education seriously, his audience was listening. The famed old man said to the young people that if they expected to improve the lives of others in the future, they must work at improving their own lives now. "Education is one of the most important weapons you have," Mandela advised, "it will place you in a far better position to serve yourself and your community." "The point is, he was young once and rebellious once and he kept his dream alive, just as you each have dreams." ExplainedSouth Africa's ambassador to theUnited States, Sheita Sisulu, as she introduced Mandela to the young crowd. Asked for specific advice about changing society by 21-year-old Ahmed Younis, Mandela suggested that somehow helping arouse more American interest in foreign affairs might be a start. "There is an impression that Americans, in general, have not followed international developments properly," Mandela said, "I'm not making that statement myself, but there are serious political analysts who say Americans are not well informed as to what has happened in the world." 22-year-old Omari Trice said Mandela left him full of passion. "He's a person who set the tone for an entire nation." said Trice. "You go away feeling you need to be Superman in order to get things done." Trice said. Question: What Sheila Sisulu said suggested that _ . Options: A: Nelson Mandela never lost hope in his life B: was especially troublesome when young C: Nelson Mandela was quite different from American youth when young D: American youth should be no more rebellious
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A

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Read the article and select the best answer. Article: Fans are desperate to lay their hands on the larger-screen iPhone 6, thanks to Apple's "hunger marketing". Analysts are busy debating which of the phones giants --Apple, Samsung or Xiaomi -- leads the Chinese market. But too few people spare a thought to environmental damage caused by cell phones. Indeed, smartphones are great innovative tools, but they also make people change phones that are as good as new, and thus worsen the already serious environmental pollution. Theoretically, a cell phone can be used for eight years, but in practice one lasts 15 months on average in China, according to D. Phone. From production to disposal, cell phones, even those made by big brands like Apple and Samsung, pollute the environment. A study by the Ecology Center of Ann Arbor, Michigan, and ifixit.com showed that each of the 36 dissected phone models contained at least one of the following poisonous elements: lead, bromine, chlorine, mercury and cadmium. And these poisonous elements are linked to birth defects, impaired learning and other serious health problems. China, the largest phone-making country and smartphone market, should be alarmed by the environment damage caused by cell phones. So there is no reason to celebrate the "good news" that last year China produced about 1.46 billion cell phones, about 81.1 percent of the total global output, and 340 million smartphones were sold in the country -- a figure that is expected to cross 400 million this year. In fact, Apple's production chain best shows the urgency for China's manufacturing sector to climb up the global value chain. Apple products are designed in the US, assembled in China and sold across the world. And while Apple takes away the lion's share of the profits, Chinese workers can barely manage to keep their pots boiling and the environment ends up paying the heaviest price. Question: Which of the following cellphone brands is NOT mentioned in the text? Options: A: Huawei. B: Apple. C: Samsung. D: Xiaomi.
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A