I saw an accident on my way to the college three days ago.

    I was waiting for the bus at the but stop. When the bus came, I got on the bus and sat on the window side. The bus started to move. After about five minutes, the bus stopped to wait for the signal(信号灯). I looked outside and saw an old man crossing the road. There were not many people on the road. A boy was riding a motorbike very fast form my side. It seemed that he did not see the signal. When the boy took notice of the old man, he tried to slow down his motorbike but there was no time. He collided with the old man very badly. The old man was thrown far away The boy also fell down. His head hit the road but it was saved because of his helmet(头盔). Both of them lay in the pool of blood. Many people gathered(聚集) around them and gave their ideas. I got afraid because I saw the whole accident. Then a woman stopped and called the ambulance( 救护车 ). It came quickly and rushed them to hospital.

    The next day I read the newspaper. The old man died in the ambulance but the boy was saved in time. This was the most terrible accident I saw ever in my life.

    Homeless people face a lot of challenges, - such as not having enough to eat and no job opportunities. Some of the most basic challenges, - however, -are not having clean water and toiletries (卫生用品)-a big problem for homeless teens. That encouraged a young researcher to invent a multi-purpose product to help these teens.

    "I was born into a life of volunteering," said 13-year-old Leia Gluckman. And that's true. Her mom is a president of an organization providing help for homeless teens. Leia and her brother have volunteered there for years. When she was a young girl, Leia helped serve food where teens were eating. Now she's a teenager herself, and she's managing the toiletry and clothing work there.

    From her work at the center, Leia noticed that teens asked for some toiletries more than others. What they needed most often were toothpaste, body powder (粉)and shampoo(洗发水).Leia wondered whether she could create a product to serve all three purposes.

    It would need to take away dirt and oil from skin and hair. It would need to clean teeth. Also, it would need to kill bacteria (病菌)without being harmful to people. She wanted her ingredients (产品成分)to be natural, to be able to break down easily and to taste and smell pleasant. Moreover, this product had to be low﹣cost and have a long shelf life.

    Leia started by going to stores and looking at the ingredient lists for toiletries. Then she tried eight different ways. She tested each way to see how well it worked.

    Not all of them worked well. But she finally decided on three. Each includes salt and baking powder. Salt helps clean teeth and skin; baking powder helps take in bad smells. She also has some other recipes which include some special materials that give her products different tastes and smells, which would let teens choose a product based on personal preferences.

    It wasn't easy, but Leia came up with some model products. She presented them at the finals of Broadcom MASTERS science competition.

    Leia wants to develop her products further. "Could it possibly be used to drive away mosquitoes (蚊子)?" she wonders.

    "Science offers a way to go about solving problems and helping people," says Leia. And she thinks her products could benefit a great number of people, not just the homeless. Anyone in an area with little or no chance to get clean water could find her products useful, maybe refugees (难民) and soldiers who are sent to places without running water.

    Betty and I are best friends. Our birthdays are on the same day, so every year we have a birthday party together. But this year, we had a costume party instead.

    While we were writing the invitations, my mum came in and asked, "Why not invite John?" John had been in our class for only a few months, but he had already got better grades in math than anyone else in class. I wrinkled(皱起) my nose," Mum, he wears the same pants to school every day. How could he even afford a costume?" Mum said nothing. The next day, Mum gave me an envelope(信封) with a shopping card in it. "I thought it would be nice for you to give this to John," Mum said. But how? We didn't want to make John embarrassed. We discussed it for a long time. Finally, Betty and I had a good idea.

    On the day of our party, kids arrived, dressed differently. John arrived, in an old sheet(床单), but still in the same brown pants as usual. We danced, ate snacks and played games in groups. Before eating the birthday cake, Betty said in a loud voice," Now it's time for the great prize game. It's the following riddle..."It was a math game. None of us was surprised when John came up with the right answer first and walked off with the envelope.

    Everything went on well as we planned. John wore a new pair of pants and a new shirt the next week. He felt happy. So did we.

    When we help others, we need to find a proper way, or we may hurt them in another way.

Mike is my pen pal. He's thirteen years old. {#blank#}1{#/blank#}. His grandparents have a big farm. They work on their farm every day. Today is Sunday. {#blank#}2{#/blank#} . He asks his classmates to visit his grandparents' farm. At 8:00, they take a bus to the farm. {#blank#}3{#/blank#}. When（当）they get to the farm，his grandparents are very happy to see them.

On the farm, the farmers are very busy. {#blank#}4{#/blank#}. The boys get some water for the farmer sand the girls feed（喂）the rabbits. In the afternoon， Mike and his classmates play on the farm. David and Eric fly a kite with the dogs. {#blank#}5{#/blank#}. They are very happy!

Billy Ray Harris was homeless. He spent each day on the streets of Kansas City, begging for money or food. Every day, as he sat thinking about his life, he occasionally heard the sound of a coin or two coming into his cup. One day, the noise was louder than usual. If Billy had looked up, he'd have seen a young lady on her way to work. But he didn't. Later when he looked into the cup, he could hardly believe what he saw. At the bottom was a shining diamond ring.

Billy's first thought was to go straight to a jeweller's(珠宝店) and that's exactly what he did. To his amazement, he was offered $4,000. Billy thought long and hard. Was this a mistake? It was more money than he'd seen in a long time. But then he thought about his grandfather, who had brought him up always to do the right thing, and knew he had to reconsider. His mind was made up. He'd keep the ring and maybe one day its owner would return.

Two days later, a young woman came while he was begging. She introduced herself as Sarah Darling and asked if he'd found anything unusual in his cup. Billy reached into his pocket and pulled out the ring. When he saw the smile on her face, he knew he'd made the right decision. She explained when putting the coins into his cup, she'd forgotten putting her ring in her purse.

But the story doesn't end there. Sarah told her husband the story and wanted to post it on the Internet. He thought it was a good idea. They also called on raising money for Billy. They had more than $185,000. Billy Ray Harris no longer spends his days begging. He has a home and a job. The story also made the local news and he was reunited with his two sisters, who he hadn't seen for 16 years. If he hadn't done the right thing, he wouldn't have seen his sisters again.

 An aquanaut(潜水员) called Fabicn Cousteau drew many people's eyes. He helps to build the world's {#blank#}1{#/blank#}(large) underwater research(研究) station. He wants the building {#blank#}2{#/blank#}(be) an underwater form of the International Space Station (ISS). And it can be used by astronauts from different countries. It's not {#blank#}3{#/blank#} easy thing to do, but the idea receives much support(支持).

 The station, named Proteus, will be at the bottom(底部) of the sea. It will be a place for{#blank#}4{#/blank#}(scientist) to study the ocean.

 Inside the station, there will be bedrooms, laboratories, medical facilities(设施) and the{#blank#}5{#/blank#}(one) underwater greenhouse for growing food. Cousteau says that it will {#blank#}6{#/blank#}(take) three years to build.

{#blank#}7{#/blank#} he is short of money to develop the project, he is trying to raise money.

 Cousteau says that underwater research is even {#blank#}8{#/blank#}(important) than doing research in space, So far, people have known only about one fifth of the ocean floor {#blank#}9{#/blank#}(clear). There are still many possible things waiting {#blank#}10{#/blank#} people to find out. So Cousteau hopes the base will lead to many exciting discoveries.