根据短文内容，选择最恰当的答案

　　Travel is fun and exciting, but it's not if you get sick．You may think,“Not me, I won't get sick on my vacation．”But for many people, that is what happens．

　　A vacation is supposed to be a time for relaxing．But very often it is not．“What can I do when I am a tourist?”This is what we should often think about．Usually there are so many places to visit：museums, shops, parks and churches．You may spend most days walking around these places．This can be very tiring．Your feet may hurt．And you may have a terrible headache after a few hours．If this is what you feel, you should take a rest．Don't ask your body to do too much．A tired body means a weak body．And a weak body can make you get sick easily．Just sit down for a few hours in a nice spot．In good weather, look for a quiet park bench．Or you can rest at a café．You can learn a lot by watching people when you have a rest．

　　Sleep is also important．If you want to stay healthy you need enough sleep．You may have trouble sleeping at night when you travel．Your hotel room may be noisy, or the bed may be uncomfortable．If that is true, don't be afraid to change rooms or hotels．You may not get enough sleep for another reason．You may want to stay out late at night．In many cities the night life can be very exciting．Then you should plan to sleep for an hour during the day．That extra hour can make a big difference．

　　Finally, if you want to stay healthy, you must eat well．That means eating the right kinds of foods．Your body needs fresh fruit and vegetables, and some meat, milk or cheese．When you are in a new country you may want to try new foods but you need to be careful about how much you eat．Lots of rich food is not very good for you．

阅读理解

　　Look at the center circles of Diagram(图)A and Diagram B．

　　Which of the centre circles looks larger?In Diagram B．In fact, they are exactly the same size．

　　Then look at the picture on the right．What do you see?A vase?Or two faces？Does the picture change quickly from one to the other again and again?Maybe or maybe not, but you can never see them at the same time．

　　“What's happening?Is something wrong with my eyes?”You may wonder at what you see．Don't worry．Here is how it goes：

　　When we look at things, our eyes send messages to our brains and then our brains interpret(解读)the information．However, sometimes our brains interpret the received information in a wrong way．It seems that our eyes are playing a joke on us．This often happens and we call it“visual illusion(视觉错误)”．

　　Movie makers often make use of visual illusions．They make the objects around actors much smaller or bigger than usual．This makes us believe that the actors are much larger or smaller than they usually are．The movies Jurassic Park and Honey I shrunk the kids just make use of visual illusions．

阅读理解

　　A clam(蚌)decided to take a rest on the bank of the River Yi．When the clouds passed, he felt cool in their shadow．When the sun returned, he felt warm．It was a good time to daydream, and so he did．

　　From above, a bird saw the clam and flew down and gave it a good peck(啄)．The clam was frightened and closed his shell tight, catching the bird's beak．

　　“Remove your beak at once,”ordered the clam．But the bird was stubborn, though she was able to pull out her beak, she refused．

　　“I will not remove my beak until you open your shell,”the bird mumbled．Like the clam, she found it was difficult to speak clearly under the situation．Of course, the clam was not about to listen to the bird and open his shell．But the bird threatened(威胁),“Open your shell or you'll be a dead clam．”“Remove your beak at once,”returned the clam．

　　“Open it!”

　　“Remove it!”

　　“Open it!”

　　The two went back and forth like this for several hours．But neither of them would follow the other's orders first, they stayed in such a state until a young man who happened to come here and carried two of them off for dinner!

阅读理解

阅读理解

　　Once there were two brothers．They were very good to each other．They were half brothers because the elder brother's mother was dead, and then his father married again．The stepmother(继母)was not kind to the elder brother, but the younger brother loved him and often helped him．

　　One day, the mother gave each of the brothers a box of seeds(种子)and enough food for a few days．She said to them,“Take them．Go and plant them．One of you must plant them on the east hill, and the other on the west hill．Do not come back if the seeds don't come out．”The mother gave very bad seeds to the elder brother, but the two brothers didn't know this, and set out the next morning．

　　When they came to a bridge, they sat down to rest．After that, they got up to say good-bye to each other, but they took the wrong boxes of seeds!

　　Ten days later, the elder brother's seeds began to grow and he came back．But the younger brother dared not return home because his seeds didn't grow．At last, he died on the hill．

阅读理解

　　Van Gogh(凡高)was born in Holland in 1853．He enjoyed drawing when he was a child．He worked for an art dealer(经营者)in London and Paris for four years, before he became a teacher in England for a short time．He moved back to France in 1877 and soon began to paint．He didn't stay long in Paris．He was attracted by the colors of the countryside and, in 1888, he moved to Arles, a small town in the south of France．There, he painted his most famous paintings．

　　He enjoyed painting people, farms, flowers, and other natural things．Some of his most famous paintings are The Potato Eaters, The Starry Night, and several different Sunflower paintings．The Starry Night is now kept in the Museum of Modern Art in New York．There is a quiet village and a tall black tree under an angry sky．Some people say that it is a true picture of the stars on that day．

　　He was poor most of his life．He made hundreds of paintings, but only sold one of them while he lived．He was a lonely, unhappy man who died at the early age of 37．

　　Today, people love Van Gogh's use of color and the emotional power(激情)of his work．Van Gogh's paintings are world famous and worth millions of dollars．Museums are around the world proudly show paintings by the great artist．

阅读理解

　　A poor boy had to sell things door by door for money to pay his schooling．One day he found that he only had one dime(一角钱)left, and he was hungry so he decided to beg(乞讨)for a meal at the next house．

　　However, he felt nervous when a lovely young woman opened the door．Instead of a meal he asked for a drink of water．She thought he looked hungry so she brought him a large glass of milk．He drank it slowly, and then asked,“How much do I owe(欠)you?”

　　“You don't owe me anything,”she answered．“Mother has taught me never to accept(接受)pay for a kindness．”He said,“Then I thank you from the bottom of my heart．”As the boy left that house, he not only felt strongly moved, but also believed in people greatly．

　　Years later the woman was badly ill．The local(当地)doctors tried their best, but couldn't cure(治愈)her．They finally sent her to a hospital in the big city．Dr Howard Kelly, now famous, was called in．when he heard the name of the town she came from, a strange light filled his eyes．Immediately(立即), dressed in his doctor's clothes, he went through the hospital hall into her room．He recognized(认出)her at once．He went back to his office and decided to do his best to save her life．From that day on, he gave special attention to her．

　　After some time, the woman was well enough．Dr Kelly asked the nurse to bring him the final bill(药费单)．He looked at it and then wrote something on the side．The bill was sent to her room．She was afraid to open it because she was sure that it would take the rest of her life to pay it off．Finally she looked, and the note on the side of the bill caught her attention．She read these words,“Paid in full with a glass of milk．－Dr Howard Kelly．”

　　Tears of joy flooded her eyes!

阅读理解

　　Is there someone you hate?Well, maybe you don't really hate them．But you get really angry every time you think of them．If you don't let this anger go, it can turn into bitterness(痛苦)．

　　Bitterness appears when we can't forgive(原谅)someone who has hurt us or made us angry．Someone might say or do something that hurts us．But instead of controlling the anger, we keep it deep inside．Before long, a bitter feeling begins to grow．We may think we're hurting that person by criticizing(指责)him or her often, but we're really only hurting ourselves．

　　Bitterness can not only lead to serious health problems such as heart disease, but also hurt our relationships with friends and family members．No one enjoys being around an angry person for very long．

　　If you see bitterness in your life, here are some ways to deal with it．

　　●Accept it

　　Instead of trying to deny your anger, make it clear to yourself and accept it．See your anger for what it is and quickly deal with it．

　　●Stop making excuses for it

　　You may feel you have a right to be angry．You may think you're right and the other person is wrong．You may even secretly enjoy making the other person look bad．But in the end, bitterness hurts you much more than the other person．The bitterness will hold you back, and the other person will go on with his or her life．

　　●Forgive(原谅)and forget it

　　You probably can't completely put the anger out of your mind．But you can decide to forgive the other person．Forget it and move on．You'll enjoy better health and peace of mind．

阅读理解

　　Napoga is a 12-year-old girl in Ghana(加纳), Africa．It is hard for her family to get clean water．Every morning, she leaves home at half past five to get clean water for her family in a village far away．It takes her six hours to get enough clean water for daily cooking and drinking．She has no time to go to school or to play with her friends．Millions of people in the world are like Napoga．They can't get enough clean water to keep healthy．

　　Earth Day is April 22．But on all other days, we must also remember it．The water we use is the most important natural resource on the earth．

　　Water covers 70％ of the earth's surface(表面)．But most of that is sea water．We can't use it for very many things．Fresh water covers only 1％ of the earth's surface．

　　You probably feel lucky that your life isn't as hard as Napoga's．But that doesn't mean you don't have to worry about water．We all face serious water problems．One of them is water pollution．All kinds of things from cars, factories, farms and homes make our rivers, lakes, and oceans dirty．Polluted water is very bad for people to drink．And dirty water is bad for fish, too．Now, 34％ of all kinds of fish are dying out．

　　How do cars and factories make our water dirty?First, they pollute the air．Then, when it rains, the rain water comes down and makes our drinking water dirty．Dirty rain, called acid rain(酸雨), is also bad for plants, animals and buildings．

　　Scientists say that in 30 years, more than half of the people in the world won't have enough clean water．We have to learn how to save more water for ourselves and our children．Here is some advice for saving water：

　　●Turn off the water while you brush your teeth．You can save as much as 450 liters(升)each month．

　　●Leaky taps(漏水的龙头)waste a lot of water．Fix them right away!

　　●You can easily cut your 10-minute showers in half－and you'll be just as clean．

　　●When you wash dishes, don't let the water run．

　　●Only wash clothes when you have a lot to wash．If your washing machine isn't full, you're wasting water!

阅读理解

　　When Carmen was a small boy, his father died．So Carmen and his mother were very poor．One day Carmen returned home from school and found his mother making some cloth．It was very beautiful and expensive．

　　“How much of your book have you read today?”Carmen's mother asked him．Carmen threw down his book．“I haven't read any of it,”he replied．“I played with some friends of mine in the fields．”

　　When his mother heard this, she picked up a pair of scissors(剪刀)and cut the cloth．

　　“Why have you cut your cloth?”Carmen asked．“It was so beautiful and now you have wasted it．”“You have wasted your time,”his mother said．“Now I have wasted mine．Look at the terrible thing we have done．”

　　Carmen learnt a lot from this lesson．After that, he always studied hard．