阅读短文，从每题所给的A、B、C三个选项中，选出最佳选项回答问题或完成句子。

　　Are you the only child in the family?If so, you are the most important in your family．Parents are the closest people to you in the world．But a lot of middle school students have a problem．They feel they're not as close to their parents as before．They even don't think their parents are fair(公平的)to them．

　　Some students complain that their parents often say a lot to them, but never listen to them．Some say their parents don't allow them to play computer games when other classmates are doing that．Others say when they're making phone calls to friends, their parents like to ask if they're speaking to a boy or a girl．These make them very unhappy．Some students even decide to leave home because they're afraid to tell their parents when they have done something wrong, especially when they do badly in exams．Then they usually think running away is the only choice(选择)．But they don't know running away may bring them some more problems．

　　Problems are parts of life．Here are some suggestions for you to solve your problems．

　　1)Find a good chance to talk with your parents．Don't be afraid to tell them your feelings．

　　2)Get help from others like good friends or teachers．

　　3)Keep a diary to help you understand more about yourself and your feelings．

　　4)Show your parents you're growing up．Then they' 11 feel you're no longer a small child．If you follow the advice, you'll have a happy life and never think of running away．

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根据短文内容，从每小题A、B、C三个选项中选出一个最佳答案。

　　This summer, Chinese sports fans will be able to watch the exciting games in 3-D on CCTV．

　　When you watch 3-D movies or TV, you have to wear a special pair of glasses．The 3-D glasses make the images(影像)from the screen look like they are there in the room with you．

　　3-D, means having three dimensions(维度)：width, height and depth．3-D technology is based on the way the human brain and eyes work．Because the pupils of a person's eyes are about 6.5cm apart, when we look at something, each eye sees it from a different angle(角度)．Our eyes send the two images to our brain, and the brain puts them together．The small difference between the image from the right eye and the image from the left eye allows us to see depth．

　　When we view media such as pictures and television in two dimensions, each eye gets the same information．That is because the image has no real depth, and there is only one way of viewing it．

　　So the goal of 3-D technology is to get a different image into each eye of the viewer．It uses two film projectors(投射器)．One projects a left eye image and the other projects a right eye image．The 3-D glasses allow us to see a different image in each eye．

　　While watching 3-D films, we feel that we are actually in the same environment as the things we’re watching．However, it also has its disadvantages．The 3-D glasses make the screen look darker．What's more, people with eye problems may get headaches if they spend too much time watching 3-D movies, because their brains need to work harder to “read” the images．

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