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Read the following article and select the best answer. Article: American nutrition expert Professor Barry Popkin says that the number of overweight people in the world is now bigger than the number of people who don't have enough to eat. A billion people worldwide now weigh too much and the number of obese people is now more than 300 million. "Obese" means at least 15 kilos heavier than you should be. However, there are also 800 million people in the world who don't have enough to eat. Professor Popkin says that the number of hungry people is falling slowly but the number of overweight people is rising fast. The main reasons for this are: * People are doing less hard physical work * More people worldwide now eat too much fatty food * Too many people are driving cars instead of walking * People spend too much time in front of a television The United States has the highest rate of obesity in the developed world and Japan has the lowest. Professor Benjamin Senauer is absolutely certain of the reasons for this. "Japanese people are fit. They use public transport and walk," he said. "The average American drives to work and drives to supermarket. When he gets home, he sits on a couch in front of the TV and eats junk food." In Britain and many other European countries, there are three times as many obese people as there were 20 years ago. About two thirds of British adults are overweight or obese. "The effects of this are clear," said London doctor Elena Power. "We have more illnesses related to weight and fewer fit people. China used to be one of the slimmest nations in the world. However, Professor Wu Yangfeng from the Chinese Academy of Medical Sciences in Beijing recently estimated that 20 percent of the world's overweight people live in China. The Chinese government is especially worried about the increase in obesity among schoolchildren. "We have a serious problem," said Professor Wu. "It requires an improvement from everyone, or it will get worse. Question: Professor Popkin probably agrees that _ . - walking to work helps people keep fit. - watching TV makes people put on weight - eating food without fat helps people keep fit - working in offices makes people put on weight
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walking to work helps people keep fit.

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Read the following article and select the best answer. Article: Stanley, as a son of a very poor farmer, left school early and went to work in a factory, for education was for the rich then. So, the world became his school. With great interest, he read everything he could, listened to the town elders and learned about the world beyond his hometown. "There's so much to learn," he'd say. "Though we're born stupid, only the stupid remain that way." He decided that none of his children would be refused an education. Therefore, Stanley insisted that we should learn at least one new thing each day. Though, as children, we thought this was crazy, we'd still do _ . And dinner time seemed perfect for sharing what we learned. We would talk about the news of the day. Sometimes the news was unimportant, but it was always taken seriously. Stanley would listen carefully and discuss it with us. Then came the moment--the time to share the day's new learning. "Felice," he'd say, "tell me what you learned today." "I learned that the population of Denmark is ...." Silence. Stanley was thinking about what was said. "The population of Denmark. Hmm. Well..." he'd say. "Get the map; let's see where Denmark is." And the whole family went on a search for Denmark. This same experience was repeated until each family member had a turn. Dinner ended only after we had a clear understanding of at least half a dozen such facts. As children, we thought very little about these educational wonders. Our family, however, was growing together, sharing experiences and joining in one another's education. And by looking at us, listening to us, respecting what we learned, confirming our value, Stanley was surely our most influential teacher. Later during my training as a future teacher, I studied with some of the most famous educators. They were imparting what Stanley knew all along--the value of continual learning. His skills have served me well all my life. Not a single day has been wasted, though I can never tell when knowing the population of Denmark might prove useful. Question: What is the greatest value of "dinner time" to the writer? - Continual learning. - Showing talents. - Family get-together. - Eating delicious food.
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Continual learning.

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Read the following article and select the best answer. Article: Today there are more fires than in the past . Over 100,000 wildfires burn each year in America . Russia has 20,000 to 35,000 wildfires and Australia has about 60,000 each year. These fires destroy huge areas of forests and burn hundreds of homes . Many experts believe there are several reasons for this sudden increase in fires. The first reason is climate change . In 2010, Russia had the hottest and driest summer with strong winds in a century. In just one month, 500 fires destroyed over 2,000 homes. Some people lost their lives . Traditional fire-fighting practices are another reason for the increase in fires. In America, firefighters used to quickly put out every fire as quickly as they could. They didn't allow the grass and trees to burn. As a result , today many forests have thicker vegetation which provides more fuel for fires . So surprisingly, America has many more fires today partly because of its past fire-fighting practices. Scientists now understand that a fire can be a natural part of a healthy forest. As a result, countries like Australia allow some fires to burn naturally. The fire makes old trees thinner. This allows sunlight to reach the ground. As a result, fires help new trees to grow. Therefore , if a fire is not a serious threat to people , firefighters may let it burn naturally . Question: Russia had so many fires in one month in 2010 because _ . - lightening spread the fire - there was much fuel for fires - there were not enough firefighters - it was very hot , dry and windy
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it was very hot , dry and windy