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Read the article and select the best answer. Article: When you don't have anything planned for the day or it's rainy outside and your children are stuck in the house, why not sit around and tell them riddles? Telling riddles will make your family laugh and sometimes even scratch their heads, trying to figure out what the answer is. Riddles have been a pastime for centuries. Not only have riddles been something for passing the time, but they have also been used to pass on secret information during the Second World War. Even the ancient Greeks used riddles. They would tell riddles at parties and whoever was the first to get them right would receive prize. Most riddles use words that have double meanings or share the same sound like "hear" and "here". So in order to get the riddle, you will have to do some creative thinking and think of all the possibilities of different words. The difficulty of figuring out the riddle is based on the riddle itself. The riddle has to provide you with enough clues to come to the right answer, but that doesn't mean that the clues have to be easy. If you are looking to tell riddles but don't know any, you can look online and you will find a large number of sites that will have hundreds of different riddles to choose from. If you would like to look somewhere else then you could look at your local bookstore, where you will be able to find many different books with thousands of riddles to choose from. You can even find websites and books that will tell you how to write your own riddles. After you have found some resources that have different riddles, you will need to read through them to find the right ones for you and your family: You will also need to make sure that your kids will have a chance to figure out the answers. So take your time and choose the right family riddles to tell. Question: To collect riddles, the author suggests _ . Options: A: one way B: two ways C: three ways D: four ways
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B

(Q).
Read the article and select the best answer. Article: SALT LAKE CITY, March 1, 2010 --- Like silkworm moths , butterflies and spiders, caddisfly larvae spin silk, but they do so underwater instead of on dry land. Now, University of Utah researchers have discovered why the fly's silk is sticky when wet and how that may make it valuable as an adhesive tape during an operation. "Silk from caddisfly larvae may be useful some day as a medical adhesive for sticking wet tissues," says Russell Stewart, an associate professor of bioengineering and principal author of a new study of the fly silk's chemical and structural properties. "I picture it as sort of a wet Band-Aid, maybe used inside in operations --- like using a piece of tape to close a cut," he adds. "Gluing things together underwater is not easy. Have you ever tried to put a Band-Aid on in the shower? This insect has been doing this for 150 million to 200 million years." There are thousands of caddisfly species worldwide. Some species spend their larval stages developing underwater, and build an inch-long, tube-shaped case or shelter around themselves using sticky silk and grains of rock or sand. Other species use silk, small sticks and pieces of leaves. Each larva has a head and four legs that stick out from the tube.The larval case gets wider as the larva grows.A caddisfly larva eventually pupates as it develops into an adult fly and then hatches. Caddisflies now live around the world in waters ranging from fast streams to quiet low lying wet land. The caddisflies'adaptation to diverse habitats is largely due to the inventive use by their larva of underwater silk to build complex structures for protection and food gathering. Caddisflies fall into two groups. Some build their case and then drag it along with them underwater as they search for food. Some build a shelter glued to a rock,with a silk net to catch passing food. Question: The passage is most probably a _ . Options: A: science fiction novel B: science news report C: biography of researchers D: social affairs report
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B

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Read the article and select the best answer. Article: In colleges around the country, most students are also workers. The reality of college can be pretty different from the images presented in movies and television. Instead of the students who wake up late, party all the time, and study only before exams, many colleges are full of students with pressing schedules of not just classes and activities, but real jobs, too. This isn't a temporary phenomenon.The share of working students has been on the rise since the 1970s, and one-fifth of students work yearround. About one-quarter of those who work while attending school have both a full-courseload and a full-time job. The arrangement can help pay for tuition and living costs, obviously. And there's value in it beyond the direct cause: such jobs can also be critical for developing important professional and social skills that make it easier to land a job after graduation. With many employers looking for students with already-developed skill sets, on-the-job training while in college can be the best way to ensure a job later on. But it's not all upside. Even full-time work may not completely cover the cost of tuition and living expenses. The study notes that if a student worked a full-time job at the federal minimum wage, they would earn just over $15,000 each year, certainly not enough to pay for tuition, room, and board at many colleges without some serious financial aid. That means that though they're sacrificing time away from the classroom, many working students will still graduate with at least some debt. And working fulltime can reduce the chance that students will graduate at all, by cutting into the time available for studying and attending classes. There is little reward for attending but not finishing college. Students who wind up leaving school because of difficulty in managing work and class are likely to find themselves stuck in some of the same jobs they might have gotten if they hadn't gone at all. The difficulty of working too much while in school can create a cycle that pushes students further... Question: What is the indirect cause of an increasing number of working students? Options: A: The need of developing social networks. B: The lack of summer jobs for young adults. C: The chance of finding a job after graduation. D: The expenses of high tuition and living costs.
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C