The polar bear is a very big white bear. We call it the polar bear because it lives in the Arctic Circle（北极圈） near the North Pole.

    The polar bear lives in snow and ice. At the North Pole there is only snow, ice and water. There is not any land. The polar bear has a very warm coat because the weather is cold in Arctic Circle. You can't find the polar bear easily in the snow because its coat is white.

    A grown-up polar bear is usually about three meters long and weights about 450 kilos. It can stand up on its back legs because it has very wide feet. It can use its front legs like arms. The polar bear can swim very well. It catches fish and sea animals for food. It goes into the sea when it is afraid. People kill the polar bear for its beautiful white coat. The governments of Canada and United States call on that people should stop killing polar bears. They don't want these beautiful animals to die out.

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    On May 17, 2009, according to the plan, Mike Good and I would take a space walk to the Hubble Space Telescope to repair an instrument. The power supply on this instrument had failed, so it could no longer be used. I would be the person doing the repair and Mike my assistant.

    Working in space is more difficult than you can imagine. As there is no gravity, you can't stand and any slight push can result in tragedy -you can be pushed into space, never be back.

    We got to the telescope. Before we could replace the power supply, we would have to remove from the telescope a handrail fixed with four screws. Having taken out the first three, I found the fourth stripped. I realized that the handrail would not come off, which meant we could no longer be able to replace the power supply and repair that instrument, which meant scientists could no longer look at the universe and find life on other planets.

    I tried all kinds of things, and nothing worked. Then Houston, the control centre on the earth, called up and told me to use the tape to tape the bottom of the handrail and pull it off the telescope. They said it was going to take about 27 kilograms of force for me to do that.

    I knew what it meant: The handrail could be completely pulled off and the safety tether might break, and I might therefore be pushed into space.

    Mike was next to me in his space suit but he could not take over my role. I turned and looked into the cabin where my five crewmates were, and nobody in there had a space suit on. However, I knew they were all looking at me. "Come on Mass, we are all behind you." The telescope must be repaired.

    "Bam!" The handrail came right off. The rest of the walk went well. We finally got the new power supply in. They tried it; turned it on from the ground. The instrument came back to life.

    At the edge of darkness, after about eight hours, I turned around and saw the Earth from our altitude at Hubble, 568 kilometers up. I saw the huge round pure blue globe home planet. It's the most beautiful, magnificent thing I've ever seen. It's like looking into heaven. It's paradise.

    One morning while Officer Vogel was on his coffee break in a restaurant, a man ran in a yelled. "Officer! A little kid is driving a car down the street!"

    He ran out at once and saw a car going slowly--about 25 miles an hour--but it was going very straight. He jumped into his police car and followed it. When the car was stopped, Officer Vogel looked inside. The driver was a little boy. His name was Rocco Morabiro and was 5. In the back seat was his two-year-old sister. Both children wen crying.

    "I want my mummy!" the boy cried." But she can't get here. I have the car." Then he had an idea." Just a minute." He told Officer Vogel." I can drive. I'll go to get her."

    "No!" Officer Vogel said. "You stay with me!" Then he drove them to the police station and he called their mother. They had many questions for Rocco. The first question was: "Where did you get the car keys?"

    Rocco said. "From the top of the refrigerator." At seven that morning Rocoo's father was work and his mother was sleeping, Rocco saw the keys on top of the refrigerator. He climbed on a chair, and took the keys.

Rocco got into the car and started the engine (引擎). When Rocco's sister heard the engine she ran to the car and cried. She wanted to go with him.

It was 7 a. m.—rush hour—so there was much traffic. Rocco drove one mile in heavy traffic. Then Officer Vogel stopped him.

    Newspapers and TV stations heard about Rocco, and a lot of reporters went to his house. Areporter asked Rocco, "What do you want to be when you grow up?"

    "A truck driver," he said, smiling.

Not being able to speak clearly can make you feel bad about yourself. But remember, you're not alone - more than 80 million people around the world stutter. Here are some tips to help you improve your speech.

Practice speaking slowly.

Spend 5 to 10 minutes each day practicing slow speech, either by yourself or with someone who can help. Choose a topic you know well, and then talk about it without using notes. This practice helps you get used to thinking before you speak, just like in real conversations.

{#blank#}1{#/blank#}

Did you know that more than 100 muscles (肌肉) in your mouth help you talk? Since there are so many muscles involved, there are lots of ways to make a sound. If one way isn't working, try another.

{#blank#}2{#/blank#}

Another idea is to record yourself while reading aloud. Many people don't like listening to their recorded voice. But if you can do that, you'll be able to find out what sounds you're having problems with, so you know what you need to practice.

{#blank#}3{#/blank#}

Telling people you stutter before you talk to them for the first time might sound like your worst nightmare (噩梦) come true, but it can really help if you get nervous talking to people. Telling them about your stutter frees you from worrying about what they might think if you happen to stutter during the conversation.

{#blank#}4{#/blank#}

Sometimes you find the greatest help just from talking to someone else who's going through the same thing as you. You can understand each other and also share tips and speech exercises that have worked for you.

What can you do to support a friend who stutters during group conversations?(no more than 25 words){#blank#}5{#/blank#} 

Welcome to life in the future! You get up in the morning and look into the mirror. You've recently had a new anti-aging treatment (抗衰老治疗), so you look like a 30-year-old. And many people your age could live to be 120 now, so at 60, you're not old at all.

Science has also found amazing ways to keep people healthy. Nanotechnology (纳米技术) can help improve your health. And if any part of your body is unhealthy, you can "grow" a new one in a laboratory (实验室).

As you get dressed, you say to your shirt, "Turn red". It becomes red. In 2045, you can program clothes to change colors or sizes.

On the way to the kitchen, you want to call a friend. Your cell phone is by the window because it gets its energy (电量) from the sun. But you don't need to pick up the phone. You can just touch your jacket to make the call.

It's breakfast time. You reach for the milk, but a voice says, "Don't drink that!" Your fridge (冰箱) knows the milk is old, and tells the supermarket to replace (替换) it. Ten minutes later, a new one will be sent back.

As you leave for work, the lights turn off (切断电路) by themselves. Your home goes into "sleep" mode (模式) to save energy. In 2045, cars drive themselves, so you just tell your driverless car where you want to go.

Will all this come true? Perhaps the future is much closer than we think.

Most students have some problems when they are in junior high school. Some students worry a lot that their parents want them to be the best. Others don't get on well with people. They are not good {#blank#}1{#/blank#} expressing their feelings.

Jim's English teacher says quickly in class. So he can't understand {#blank#}2{#/blank#} English teacher's words during classes. And he can't master basic English. Every time he needs to answer questions in class, he {#blank#}3{#/blank#} too nervous to say anything. He goes {#blank#}4{#/blank#} of his way to learn, but he still makes mistakes. So he is down. His brain was {#blank#}5{#/blank#} and he couldn't talk.

Another student, Mary, is afraid of exams. When she looks at the exam paper, she doesn't know {#blank#}6{#/blank#} to write. Her parents are strict with her. Sometimes she cries with{#blank#}7{#/blank#}.

Some students don't like to ask teachers or classmates for help {#blank#}8{#/blank#} they think it will be a shame. Others don't want to talk to anyone about their study. An expert has some{#blank#}9{#/blank#} for teenagers: Talk with your parents or teachers often. {#blank#}10{#/blank#} some group activities and play sports. They will be good for their development.