Q: I'm taking a test and have to guess the right answer to the question after the article. Article: Below is a selection from a popular science book. If blood is red, why are veins blue? Actually, veins are not blue at all. They are more of a clear, yellowish colour. Although blood looks red when it's outside the body, when it's sitting in a vein near the surface of the skin, it's more of a dark reddish purple colour. At the right depth, these blood-filled veins reflect less red light than the surrounding skin, making them look blue by comparison. Which works harder, your heart or your brain? This question depends on whether you're busy thinking or busy exercising. Your heart works up to three times harder during exercise, and shifts enough blood over a lifetime to fill a supertanker. But, in the long run, your brain probably tips it, because even when you're sitting still your brain is using twice as much energy as your heart, and it takes four to five times as much blood to feed it. Do old people shrink as they age? Yes and no. Many people do get shorter as they age. But, when they do, it isn't because they're shrinking all over. They simply lose height as their spine becomes shorter and more curved due to disuse and the effects of gravity . Many (but not all) men and women do lose height as they get older. Men lose an average of 3-4 cm in height as they age, while women may lose 5 cm or more. If you live to be 200 years old, would you keep shrinking till you were, like 60 cm tall, like a little boy again?No, because old people don't really shrink!It is not that they are growing backwards--their legs, arms and backbones getting shorter. When they do get shorter, it's because the spine has shortened a little. Or, more often, become more bent and curved. Why does spinning make you dizzy ? Because your brain gets confused between what you're seeing and what you're feeling. The brain senses that you're spinning using special gravity and motion sensing organs in your inner ear, which work together with your eyes to keep your vision and balance stable. But when you suddenly stop spinning , the system goes out... Question: Why do some old people look a little shrunken as they age? Options: A: Their spine is in active use. B: They are more easily affected by gravity. C: They keep growing backwards. D: Their spine becomes more bent.
A: D

Q: I'm taking a test and have to guess the right answer to the question after the article. Article: Their thumbs sure must be sore. Two central prefix = st1 /Pennsylvaniafriends spent most of March in a text - messaging record attempt, exchanging a thumbs-flying total of 217,000. For one of the two, that meant an inches-thick itemized bill for $ 26,000. Nick Andes, 29, and Doug Klinger, 30, were relying on their unlimited text messaging plans to get them through the escapade , so Andes didn't expect such a big bill. " It came in a box that cost $ 27.55 to send to me." he said. He said he "panicked" and called T-Mobile, which said it would investigate the charges. The two Lancaster-area residents have been practically non-stop texters for about a decade since they attended Berks Technical Institute together. That led Andes to searching for the largest monthly text message total he could find posted online: 182,000 sent in 2005 by Deepak Sharma in India. Andes and Klinger were able to set up their phones to send multiple messages. During a February test run they found they could send 6,000 or 7,000 messages on some days, prompting the March messaging marathon. " Most were either short phrases or one word, 'LOL' or 'Hello', things like that , with tons and tons of repeats," said Andes, reached by phone. Andes sent more than 140,000 messages, and Klinger sent more than 70,000 to end the month with a total of just over 217,000, he said. A spokesman for Guinness World Records didn't immediately return messages asking whether it would be certified as a record. April came as a relief to Andes' wife , Julie, who had found his phone tied up with texting when she tried to call him on lunch breaks. " She was tired of it the first few days into it, "Andes said. Question: We can infer from the passage that Options: A: The two men were carrying on another messaging marathon the next month B: They decided to share the bill C: They sent much fewer messages later. D: Andes wife supported him whatever he did.
A: C

Q: I'm taking a test and have to guess the right answer to the question after the article. Article: Now,I'll tell you something about the Internet.The Internet is a network of computers.It became popular in the 1990s.Now,we live in the Internet Age.The Internet is very useful.You can get information,do some shopping or talk with people all over the world.You can do all these things in your own room. You can set up your own space on the Internet.We call it a homepage.It's open to anyone in the world.Write your message on your homepage.Soon,you can get answers by email from people around the world. The Internet is also useful when a flood or an earthquake happens somewhere in the world.We can learn about the needs of the people there and send them food and medicine more quickly than before. In the world of the Internet,everyone is equal.Famous writers,artists,and scientists--they are all your friends.A lucky person can even find a message from the president of a country. Some people lose themselves in the world of the Internet.That's really bad.Remember that the world of the Internet is not a real world.Facetoface communication with family,friends,and neighbours is very important.Don't forget that the Internet is only a tool for communication and information. Many people say that the Internet has some problems,but most people agree the Internet still has a wonderful future.For the first time in history,anyone can exchange messages and information immediately with other people. Question: The Internet became popular _ . Options: A: in the 1980s B: in the 1990s C: in the year 2000 D: in the 21st century
A: B