user: I'm taking a test and have to guess the right answer to the question after the article. Article: What do the common cold, the flu, and AIDS have in common? They are all diseases caused by viruses, tiny microorganisms  that can pass from person to person. It is no wonder that when most people think about viruses, finding ways to  _ them is what is on people's minds.    Not everyone runs from the tiny disease carriers, though. In Cambridge, Massachusetts, scientists have discovered that some viruses can be helpful in an unusual way. They are putting viruses to work, teaching them of the world's smallest rechargeable batteries.   Viruses and batteries may seem like an unusual pair, but they are not so strange for engineer Angela Belcher, who first came up with idea. At the Massachusetts Institute of Technology in Cambridge, she and her team bring together different areas of science in new ways. In the case of the virus-built batteries, the scientists combine what they know about biology, technology and production techniques.   Belcher's team includes Paula Hammond, who helps put together the tiny batteries, and Yet-Ming Chiang, an expert on how to store energy in the form of a battery. Many batteries are already pretty small. However, every year, new electronic devices like personal music players or cellphones get smaller than the year before. As these devices become smaller, ordinary batteries won't be small enough to fit inside.    The ideal battery will store a lot more energy in a smaller package than ordinary batteries. Right now, Belcher's model battery, a metallic disk completely built by viruses, looks like a regular watch battery. But inside, its parts are very small--- so tiny that you can only see them with a powerful microscope.    How small are these battery parts? To get some idea of the size, pluck  one hair from your head. Place your hair on a piece of white paper and try to see how wide your hair is--- pretty thin, right? Although the width of each person's hair is a bit different, you could probably fit about 10 of these virus--- built battery parts, side by side, across one hair. These... Question: What is the passage mainly about? Options: A: Diseases caused by viruses. B: An engineer called Angela Belcher. C: Batteries built by viruses. D: Rechargeable batteries.
C
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I'm taking a test and have to guess the right answer to the question after the article. Article: A group of graduates, successful in their careers, got together to visit their old university professor. Conversation soon turned into complaints about stress in work and life. Before offering his guests coffee, the professor went to the kitchen and returned with a large pot of coffee and a variety of cups--porcelain, plastic, glass, crystal, some plain looking and cheap, some exquisite and expensive--telling them to help themselves to the coffee. When all the students had a cup of coffee in hand, the professor said: "If you noticed, all the nice looking expensive cups were taken up, leaving behind the plain and cheap ones. While it is normal for you to want only the best for yourselves, that is the source of your problems and stress. Be assured that the cup itself adds no quality to the coffee. In most cases it is just more expensive and in some cases even hides what we drink. What all of you really wanted was coffee, not the cup, but you consciously went for the best cups... And then you began eyeing each other's cups. Now consider this: Life is the coffee; the jobs, money and position in society are the cups. They are just tools to hold and contain Life, and the type of cup we have does not define, nor change the quality of life we live. Sometimes, by concentrating only on the cup, we fail to enjoy the coffee God has provided for us." God brews the coffee, not the cups. Enjoy your coffee! "The happiest people don't have the best of everything. They just make the best of everything. "[Z Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God. Question: The best title for the passage would be   _  . Options: A: God's Coffee B: The Pressure of Life C: The Happiest People D: Professor's Coffee Cups
A
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I'm taking a test and have to guess the right answer to the question after the article. Article: Whether it's a carol service or an evening of karaoke in the pub, many people will enjoy a good old singsong this Christmas. Singing aloud will not just lift the spirits---it's good for your physical health as well. Filling the lungs with air, increasing the heart rate and getting blood pumping round the body faster can all help our physical health. For the past few years Heart Research UK has been Funding a Christmas campaign aimed at getting people singing, simply for the benefit it can bring. The organizer of the campaign says singing is a safe, simple and social activity that everyone can enjoy. "Singing is linked to long life, stress reduction, and general health protection. It also brings a great amount of happiness. It is impossible to sing well with a long face because it affects your pitch ." Professor Graham Welch, who leads the International Music Education Research Centre at the University of London, has spent more than 30 years studying the effects of singing. He says that singing is a form of exercise. It means we're also having a strong aerobic activity when we're singing, which results in increasing the feeling of pleasure while decreasing that of stress. "And communal singing--like in a singing group, a church service or even a singsong in the pub--helps improve our sense of self-respect. It increases our sense of satisfaction with ourselves, a greater sense of feeling included. " Helen Astrid, a singing teacher, also sees the great effects that singing brings. "It lifts us up on a spiritual level, it helps our self-respect, and it's great for all ages from small kids to grannies--you can have a good sing and _ ." But she warns people not to have too many beers or glasses of wine, though a glass may help them gather courage before taking to the stage during the holidays. Question: What can we infer from the passage? Options: A: Singing at Christmas is good for health. B: In a low mood one is not able to sing well. C: Experts have disagreement on singing. D: Singing is the same as other aerobic activities.
B
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I'm taking a test and have to guess the right answer to the question after the article. Article: Sure, human dads can play games with their kids and help with homework, but can they give birth? Daddy sea horses can! This Father's Day, while you're praising your daddy, you may also remember that some of the best dads in the world can be found in the animal kingdom: Sea horses: The "Mr. Moms" in the sea, male sea horses, carry up to 2,000 fertilized eggs in small bags in their stomachs until _ hatch. Even after the babies are born, they stay inside the bag until they are ready to live by themselves. Darwin's rheas: Thought your dad was overprotective? Darwin's rheas, also known as South American ostriches  , are so protective of their children that they have even been known to attack small airplanes on the ground if they get too close to their home! Marmosets: These little monkeys do everything but give lectures on how to give birth! Devoted dads assist during their babies' birth. They also let Mom get some rest by taking care of the kids when she's not nursing them. Sand grouse: These pigeon-like birds live in areas where water is rare, so fathers fly as many as 50 miles to get water for their kids. After they dip their breast feathers in the water, they fly home and let their chicks suck the water from their bodies. Fathers in the animal kingdom are not that different from our own beloved dads. This Father's Day, when you are honoring your dad, honor animal dads, too, by practicing kindness toward all animals. Question: According to the passage, which animal is the most protective? Options: A: A sea horse B: A Darwin's rhea C: A marmoset D: A san grouse


assistant: B
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