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　　Healthy eating habit along with regular exercise is the only way to become fit．If you have the correct number of calories and exercise regularly, you will lose weight, keep fit, and feel great, too．

　　During your teenage years, it is important to give your body the energy it needs．If you skip(跳过)meals, you won’t get enough calories, and then you will feel tired．By the way, calorie is just another word for energy．About 50％ of your calories should come from rice, bread, vegetables and fruit．You also need to drink a lot of water, 6 to 8 glasses a day．Water helps keep your system clean．Drinking enough water will make your skin better and make you healthy．

　　Exercise is something that can help to make you look good, feel good and be healthy．Experts suggest that teenagers spend at least 30 minutes exercising, five times a week．That is easy to do! You can walk or ride your bike to school, and do sports at school．However, teenagers often give up sports, saying they have no time left after their studies．In fact, doing exercise can help them sleep better at night and increase their ability to focus on their study．

　　If you follow the suggestions above, you will look and feel much better and become fit．

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Welcome to Lijiang．Lijiang is a nice place to visit．If you visit Lijiang, you’d better do as the following．

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　　A fish that lives in America can live out of water for months at a time, similar to how animals got used to land millions of years ago, a new study shows．

　　The Mangrove Rivulus, a kind of little fish, lives in small pools of water．When their living place dries up, they live．on the land, said Scott Taylor, a researcher in Florida．

　　The fish can grow as large as three inches．They group together and breathe air through their skin before they can find water again．

　　The new scientific discovery came during a trip．

　　"We were travelling for fun．and one day I kicked over a log(圆木)and the fish came out," Taylor told reporters by telephone．He said he would make his study on the fish known to the public in an American magazine early next year．

　　In lab tests, Taylor said he found the fish can live up to 66 days out of water without eating．

　　Some other fish can live out of water for a short period of time．The walking catfish found in Southeast Asia can stay on land for hours at a time, while lungfish(肺鱼)found in Australia, Africa and South America can live out of water, but only in a not active(活波的)way．But no other known fish can be out of water as long as the Mangrove Rivulus and keep active, according to Patricia Wright, a biologist at a Canadian University．

　　More studies of the fish may tell how animals changed over time．

　　"These animals live in conditions similar to those millions of years ago, when animals began to move from water onto land," Wright said．

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　　You may have heard of the famous saying, "East or West, home is the best．"

　　What does the word "home" mean to you? How do you say the word in French? In Chinese? In your language? Although people usually know what the word means, it sometimes has no exact translation．It's not surprising, because the idea of home is "different from country to country, and from person to person．A home is more than a roof and four walls．It's the cooking, eating, talking, playing and sleeping that go on inside．And at home you usually feel safe and relaxed．

　　Homes look different in different countries．They also have different things inside．For example, in cold northern Europe, there's a fire in the living room or kitchen and all the chairs face it．In the south, where the sun shines a lot and it's more important to keep the heat out, there are small windows and cool stone floors．

　　We asked some people about their homes．

　　"In my country many people don't stay in one place for a very long time．They often move every ten years or so．"

－Chery, Boston, USA．

　　"In Britain, even in town, there's always a garden．We have separate bedrooms and living rooms．But we don't often have balconies(阳台)．The weather isn't warm enough!"

－Pat, Exeter, England

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　　I went home one Saturday afternoon in the autumn of 1993 to get some work done in the garden．While sweeping leaves on the ground, my five-year-old son Nick came over and asked me to write something on a piece of paper to make a sign for him．

　　"What for?" I asked．

　　"I'm going to sell some of my stones," he answered．

　　Nick was fascinated with stones and had collected many stones from all over．

　　"I'm too busy to do that for you．Go and ask your mum for help," I said．

　　A short time later, Nick, returned with a sign, reading, " Stones, One Dollar Each"．He took the sign, a small chair and 4 of his best stones and walked to the road in front of our garden．There he put the stones in a line and sat down on the chair．

　　After half an hour, nobody passed by．I walked to him and asked him to go back, but he didn't．

　　Another half hour later, a small car came down the road．I watched as Nick stood up, holding his sign up．A woman rolled down a window and read the sign．I couldn't hear their talk, but I saw the woman turn to the driver and the man reach for his pocket．

　　I sat in the yard, as Nick ran to me．Waving the dollar, he shouted, "I told you I could sell one stone for a dollar－if you believe in yourself, you can do anything．"

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