Read the following article and select the best answer. Article: Do you want to see the effects of global warming? Then head north. Will Steger is going to take all of us there. Steger, 64, the first person to make a dogsled trip to the North Pole, is a very famous and admired polar explorer. He's at home in frozen parts of the world where few humans ever step on. Steger is also a devoted environmentalist who was early to ring the alarm bell on global warming. He saw its effects firsthand in frequent polar expeditions to the Arctic and Antarctica. Now Steger is about to lead a team of six young adventurers on a 1,400-mile, 60-day-long dogsled trip across Ellesmere Island, in the Canadian Arctic. The sea ice in that region should still be frozen. "We want to take our audience to the front lines of global warming," says Steger. The team will be uploading videos, stories and photos to the website globalwarming101.com as they march along, allowing armchair adventurers and kids in classrooms to follow their progress day to day. "We can actually bring the audience up there," Steger says. Steger's team will include some already-famous young explorers. Sam Branson, the 22-year-old son of British airline tycoon Richard Branson, is an experienced Arctic traveler. Also on the journey will be 27-year-old Norwegian Sigrid Ekran. Last year, Ekran became only the second woman in history to win Rookie of the Year for the Iditarod Sled Dog Race. What they will see may be very surprising. Even Steger doesn't know exactly what to expect. Climate change has already reshaped the geography of the Arctic. "Within a decade or less, it's going to be impossible to reach the North Pole by dog team without flotation ," says Steger. Climate change is happening, but people can change too. Their willingness to change will determine the shape of the Earth's future. Question: What would be the best title for the passage? - The Arctic is in danger - Sledding through the Arctic - Discoveries of the Arctic - Consequences of global warming
Sledding through the Arctic

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Read the following article and select the best answer. Article: In China, chain restaurants -- especially the big multinational ones -- are cool. Going to Starbucks, for example, is a status symbol. It not only says, "I'm rich enough to buy this overpriced coffee," but also, "I'm cosmopolitan enough to be part of globalization." Where I come from in the UK, however, chains are neither fashionable nor gourmet . Chains are where you go on New Year's Day when nowhere else is open, or when you are 5 years old and your parents can't stand hearing, "I'm huuuuuungry!" any longer. In my own case (with regards to McDonald's), a chain is where you are taken on your first "date". Even at the age of 13, I knew to give the guy the "let's just be friends" phone call the next day. In the UK, independent cafes and restaurants are making a comeback on the fashion scene. Nowadays, a Londoner who says "let's meet for a coffee at Monmouth" (an independent cafe) is much cooler than one who says "let's go to Starbucks". Even if Monmouth's coffee is a little more expensive, there's a satisfaction in knowing your pounds aren't going straight to the big corporations. Of course, there are chain stores all over the UK; you can't go five minutes without spotting a Costa Coffee. But numbers do not add up to good taste. I do, however, have a confession . After moving to China I had moments when all the rice and Kung Pao Chicken became too much. I, too, have _ to McDonald's. Question: Many Chinese people like to go to multinational chain restaurants because _ . - the restaurants give customers a taste of foreign culture - the restaurants offer different food and drinks from other restaurants - these restaurants are perfect places for a romantic date - they believe that eating there will show their wealth and social status
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they believe that eating there will show their wealth and social status

Read the following article and select the best answer. Article: There are new findings that not enough sleep may cause people to gain weight.Researchers say a lack of sleep can produce hormonal changes that increase feelings of hunger. In one study,researchers in the United States examined information on more than 1000 people.The people had taken part in a long-term study of sleep disorders. Some people slept less than five hours a night.They had 15 percent higher blood levels of a hormone called ghrelin than people who slept eight hours.And they had 15 percent less of the hormone leptin.Experts say ghrelin helps make people feel hungry;leptin makes you feel full. The scientists say these hormonal changes may be a cause of obesity in Western societies.They note the combination that limitation is common and is widely available. The results were not affected by how much people exercised.People who are awake longer have more time to burn energy.But the researchers say loss of sleep may increase hunger especially for high-calorie foods,so people gain weight.It seems that,for survival,the body may be designed to store more fat during times with less sleep. Researchers from Stanford University in California and the University of Wisconsin did the study.They found that the best amount of sleep for weight control is 7.7 hours a night. The Public Library of Science published the findings in its journal Medicine.Internet users can read the full study,free of charge,at plos.org. Question: Which of the following shows the right way in which lack of sleep causes weight gain? - more ghrelin and less leptin-feeling hungry-eating more - feeling hungry-eating more-more ghrelin and less leptin - burning more energy-feeling hungry-eating more - more leptin and less ghrelin-feeling full-less exercise
more ghrelin and less leptin-feeling hungry-eating more