*Question*
Read the following article and select the best answer. Article: The Intel Science Talent Search is the top science competition for high school students in the US. The 40 finalists were honored in Washington last week. They met with scientists and politicians. President Obama welcomed them to the White House. These 40 students were selected from almost 2,000 contestants nationwide. They had to present original research to be judged by professional scientists. The students showed their research projects on large posters. The winners were announced on March 15th, 2011. Wendy Hawkins is executive director of the Intel Foundation, who says the 40 finalists represented excellence across many areas of science. Selena Li is from Fair Oaks, California. She wanted to find a more effective treatment for liver cancer. She began her research four years ago. A scientist at the University of California, Davis, taught her how to design and do experimental work in the laboratory. Ms. Li placed 5th in the Intel Science Talent Search and was awarded 30,000 dollars. Scott Boisvert lives near Phoenix, Arizona. He began using a laboratory at the University of Arizona at the age of 14. Over four years, he completed a project studying a fungus linked to the decrease in amphibians around the world. He was trying to find out if different chemicals and substances in the water could kill the fungus. He collected and tested water samples across Arizona. He says, "My results were able to identify a list of chemicals that were significant in the growth and in the movement of the fungus." He placed10th in the Intel competition and was awarded 20,000 dollars. Evan O'Dorney of Danville, California, won the top award of 100,000 dollars in this year's Intel Science Talent Search. For his mathematical project, he compared two ways to estimate the square root of an integer , a number with no fractional parts. Wendy Hawkins at the Intel Foundation says these young people represent the next generation of scientists who will help shape America's future. Question: Who will be probably engaged in math study in the future and become a mathematician? - Wendy Hawkins. - Selena Li. - Scott Boisvert. - Evan O'Dorney
**Answer**
Evan O'Dorney

*Question*
Read the following article and select the best answer. Article: Climate change, global warming, the greenhouse effect ... these days nobody denies that there is something strange and worrying happening to the atmosphere. Scientists are puzzled by the rise in carbon dioxide in the atmosphere. They are afraid that the world may be a short way from what they refer to as uncontrolled global warming. At Mauna Loa Observatory in Hawaii, meteorologists have been carefully monitoring the amount of carbon dioxide in the Earth's atmosphere for the past 50 years. Until recently, there has been a gradual increase of around 1.5 parts per million (ppm). In 2013 the figure rose to 2.08 ppm and in the following year they registered an increase of 2.54 ppm. .Climate analysts feel that it istoo soon to draw conclusions about the phenomenon although the public are concerned that the carbon dioxide emissions are getting out of control. Jason Samenow, the chief meteorologist in the American National Weather Service,thinks that instead of having decades to find a solution to the problem, people might have only a few years. He believes that the Earth's natural systems for absorbing the gas are breaking down resulting in the uncontrolled green house effect. He insists that this is something that could happen if the Earth'stemperatures rose to such a degree that it was unable to contain the heat. . One interesting aspect of this climate change ng down resulting in the uncontrolled greenhouse effect. He insists that this is something that could happen if the Earth's temperatures rose to such a degree that it was unable to contain the heat.is that it is not happening in a uniform way around the world. Carbon dioxide levels in the South Pole are noticeably lower. This suggests that something has happened in the northern hemisphere that set off the rise. Forest fires in North America might hold the answer to the puzzle, along with very hot summers in Europe. The 2014 heat wave was certainly out of the ordinary. Statistics claim that more than 30,000 people lost their lives as a direct result of the... Question: What opinion does Jason Samenow hold on the gradual increase of carbon dioxide? - People still have decades to solve this problem. - Uncontrolled greenhouse effect may happen in some situation. - The Earth's natural systems for absorbing the gas have completely broken down. - The public shouldn't be responsible for carbon dioxide emissions.
**Answer**
Uncontrolled greenhouse effect may happen in some situation.

*Question*
Read the following article and select the best answer. Article: Feel tired lately? Has a doctor said he can't find anything wrong with you? Perhaps he sent you to a hospital, but all the advanced equipment there shows that there is nothing wrong with you. Then , consider this: you might be in a state of sub - health . Sub - health, also called the third state or gray state, is explained as a borderline state between health and disease. According to the survey by the National Health Organization, Over 45 percent of sub - healthy people are middle-aged or elderly. The percentage is even higher among people who work in management positions as well as students around exam week. Symptoms include a shortage of energy, depression, slow reactions, insomnia and poor memory , Other symptoms include shortness of breath, sweating and aching in the waist and legs. The key to preventing and recovering from sub - health, according to some medical experts, is to form good living habits, ale mate work and rest, exercise regularly, and take part in open air activities. As for meals, people are advised to eat less salt and sugar . They should also eat more fresh vegetables, fruits, fish because they are rich in nutritional elements - vitamins and trace elements - that are important to the body. Nutrition experts point out that it is not good to eat too much at one meal because it may cause unhealthy changes in the digestive tract . They also say that a balanced diet is very helpful in avoiding sub - health. Question: Middle - aged people may be easy to get sub - healthy because _ . - they have used up their energy - they have lost their living hopes - they have more pressure in life and work. - they have changed their way of life
**Answer**
they have more pressure in life and work.

*Question*
Read the following article and select the best answer. Article: In 1901, H.G. Wells, an English writer, wrote a book describing a trip to the moon. When the explorers landed on the moon, they discovered that the moon was full of underground cities. They expressed their surprise to the "moon people" they met. In turn, the "moon people" expressed their surprise. "Why," they asked, "are you traveling to outer space when you don't even use your inner space?" H.G. Wells could only imagine travel to the moon. In 1969, human beings really did land on the moon. People today know that there are no underground cities on the moon. However, the question that the "moon people" asked is still an interesting one. A growing number of scientists are seriously thinking about it. Underground systems are already in place. Many cities have underground car parks. In some cities, such as Tokyo, Seoul and Montreal, there are large underground shopping areas. The "Chunnel", a tunnel connecting England and France, is now complete. But what about underground cities? Japan's Taisei Corporation is designing a network of underground systems, called "Alice Cities." The designers imagine using surface space for public parks and using underground space for flats, offices, shopping, and so on. A solar dome would cover the whole city. Supporters of underground development say that building down rather than building up is a good way to use the earth's space. The surface, they say, can be used for farms, parks, gardens, and wilderness. H.G. Wells' "moon people" would agree. Would you? Question: What would be the best title for the text? - Alice Cities--cities of the future. - Space travel with H. G. Wells. - Building down, not up. - Enjoy living underground.
**Answer**
Building down, not up.