Read the article and select the best answer. Article: More and more people take part in marathons these days - over 30,000 people will run the London Marathon this weekend, for instance. But it's not just the 26 miles and 385 yards that could be a daunting prospect. "I have to admit to being completely frustrated by the blocking and for 18-19 miles was just keeping away from people and being held up," one participant grumbled after the 2012 London Marathon. "I had to overtake a lot of people and ended up with bruised forearms from all the elbows," said another. How do such crowding problems arise, and could they be reduced? Some researchers believe that we can find the answers through a more familiar system in which jams appear - road traffic flow. Martin Treiber, of the Technical University of Dresden in Germany, has previously developed models for traffic flow. One of the first attempts to model traffic flow was made in the 1950s by James Lighthill and his collaborator Gerard Whitham of Manchester University. They considered the traffic as a kind of liquid flowing down a pipe, and looked at how the flow changes as the fluid gets denser . At first the flow rate increases as the density increases, since you simply get more stuff through in the same period of time. But if the density becomes too high, there's a risk of jams, and the flow rate drops sharply. Treiber's model of a marathon uses this same principle that the flow rate first increases and then decreases as the density of runners increases, thanks to an sudden switch from free to crowded flow. He assumes that there is a range of different preferred speeds for different runners, which each maintains throughout the race. With just these factors, Treiber can calculate the flow rate of runners, knowing the "carrying capacity" at each point on the route. This allows Treiber to figure out how blocking might depend on the race conditions - for example, for different starting procedures. Some marathons start by letting all the runners set off at once (which means those at the back have to wait until those in... Question: What's the main idea of the passage? Options: A: Make a comparison between marathon and road traffic. B: Running a marathon is somewhat dangerous if it is not well organized. C: Introduce a new technology to solve the blocking problem in marathon. D: Some advice for people who are to run a marathon.
C

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Read the article and select the best answer. Article: A dog a newborn baby abandoned by its 14-year-old mother in a field in rural Argentina until the boy was rescued, a doctor said on August 22 (Friday). A resident of a rural area outside La Plata called police late Wednesday night to say that he had heard the baby crying in a field behind his house. The man went outside and found the infant lying beside the dog and its six newborn puppies, Daniel Salcedo, chief of police of the Province of Buenos Aires, told CNN. The temperature was a chilly 37 degrees, Salcedo said. The dog had apparently carried the baby some 50 meters from where his mother had abandoned him to where the puppies were huddled, police said. "She took it like a puppy and rescued it," Salcedo said. "The doctors told us if she hadn't done this, he would have died." "The dog is a hero to us." Dr. Egidio Melia, director of the Melchor Romero Hospital in La Plata, told CNN that police showed up at the hospital at 11:30 pm Wednesday with the baby who doctors say was only a few hours old. Though the infant had superficial scratches and bruises and was bleeding from his mouth, he was in good shape, Melia said. The next morning, the child's mother was driven by a neighbor to the hospital and told authorities the 8-pound, 13-ounce infant is hers, Melia said. The teenager was immediately give psychological treatment and was hospitalized, he said. She has said little about the incident. The child has been transferred to a children's hospital in La Plata, 37 miles from Buenos Aires. Question: What's the text mainly about? Options: A: A baby was rescued by a dog. B: A baby was abandoned by its parents. C: How an abandoned baby was saved by doctors. D: Dogs are heroes to human beings.
(Answer)
A

Ques: Read the article and select the best answer. Article: We were on our way home from Houston one Saturday morning. We decided to stop at a local gas station to get coffee and something to snack on since it was a good hour and a half before we got home. When we were done, we got back into our car and before I started it, we noticed a man standing outside in front of the building. He was a homeless man with worn clothes and it looked like he had gone in and gotten himself some coffee or something warm to drink since it was cold this time of the year. He must have not had enough money to get something to eat. Then a dog walked up to the front of the building. I could tell she was a "she", because you could tell that she had baby dogs. She was terribly in need of something to eat and I felt so bad for her. I knew if she didn't eat soon, she and her baby dogs would not make it. I and my wife sat there and looked at her. We noticed that people walked by and didn't even pet her, like most people do when they walk by an animal in front of a store. We still did not do anything. But the homeless man, who I thought did not buy himself anything to eat, went back into the store. And what he did brought tears to me and my wife. He had gone into the store and with what money he may have had, bought a can of dog food and fed that dog. This story plays a great part in our lives. You see, that was Mother's Day weekend. And a lot of people forget that some animals are parents too. It took a homeless man, to show me what I should have done. He make me a better man that day. Question: Seeing what the poor man did for the dog, the author and his wife _ . Options: A: were puzzled B: were greatly moved C: regretted they hadn't done anything D: were indifferent
Ans: B

Ques: Read the article and select the best answer. Article: The American tradition of Thanksgiving dates back to colonial times, to the Pilgrims of Plymouth rock Colony. To escape religious persecution in England, the Pilgrims journeyed to the New World on their ship, the Mayflower. After a long journey, they finally arrived at Plymouth Rock in autumn of 1620. They could not finish building the settlement before winter, so many froze to death. They ate most of their food on the journey over, so many also starved. However, the Pilgrims met a Native American named Tisquantum, or Squanto as he was better known, who taught them how to plant corn and catch eel . By the same time next year, the Pilgrims had built a steady settlement, and had a bountiful harvest. To thank the Native Americans for their help and to celebrate the harvest, the Pilgrims held a grand banquet . Together, they feasted on corn, yams, fish, and most importantly: roast turkey, which became the highlight of the modern Thanksgiving feast. Schools always make a big deal about Thanksgiving, because they feel that it teaches children how to be thankful and to treat others with kindness. I spent the many years of elementary school making paper turkeys, fake cornucopias(a shell filled with food, a symbol of the holiday), and writing lists of what I'm thankful for. When I grew older, I watched movies and read books about the First Thanksgiving, and completed crossword puzzles and word searches filled with holiday themed words. While the idea for Thanksgiving is great, and it is a wonderful opportunity to instill certain values in children, I don't think we should name a special holiday for being thankful. We should be thankful for what we have every day, not just Thanksgiving. Question: What's the main reason for the English Pilgrims to leave their home country? Options: A: Political ideas. B: Religious beliefs. C: Hard life. D: Hopes for fortune.
Ans:
B