Last summer, 15-year-old Bob had a problem. Like a lot of children, Bob was interested in doing many things. He liked dancing best and wanted to join a dancing group. But Bob's high school didn't have a boys' dancing group but a girls' group. He tried to join the girls' group. And he made it.

Bob thought his problem was over after he had been one of the dancers in the dancing group. But a bigger problem was just beginning. The teacher didn't allow Bob to stay in the girls' group. “If Bob stay in the group,” the teacher said, “other boys will want to join and girls might leave.” They took Bob off the group(开除).

Bob was very angry about it, so he went to a judge (法官). The judge said it was not right and told the teacher to let Bob go back to the dancing group.

    Once upon a time, there was a tree which wanted to become a treasure box. One day, a farmer cut it down and sold it to a carpenter(木匠). The tree was happy because he thought the carpenter would make it into a treasure box.

    To its surprise, the carpenter made it into a feed box for animals. The tree felt very disappointed because that was not its dream. Several years later, the feed box was thrown away. Someone picked it up and placed it into an old temple. The tree forgot its dream little by little.

    One day, a couple came to the temple. The woman gave birth to a baby boy. There wasn't a bed in the temple. So they placed the baby in the feed box. They loved him and regarded him as their treasure. The tree suddenly realized that it became a real "treasure box" at that time.

    Sometimes you may think your dream will not come true. Don't forget your dream. It may be realized in another new way.

    "My dear lady," says Holmes. "You're shivering. Are you cold? Do you want a cup of hot tea?"

    "I'm not cold," the woman replies. "I fear for my life!"

    "We are here to help you. Don't worry about anything. I don't know you. But I know many things about you. For example, I know how you travel. You came to London by train. You also rode to the train station on a horse­drawn wagon(马拉车). "

    "Why, yes. You're right. But how do you know these things？"

    "I see a return ticket in your glove. I see fresh mud on the left arm of your dress. Now tell us your problem. "

    "My name is Helen Stoner," she states. "My mother and father are dead. I am living with my stepfather, Dr Grimesby Roylott. He comes from a rich family. But they are no longer rich. They have nothing except a small piece of land and a huge old house. We are living in the house. Dr Roylott is using my mother's money for expenses(开支). Part of it was for my sister and me. It was for our marriages."

Holmes is sitting in his chair. His eyes are closed. He is listening carefully to Helen's story. He hears every detail.

    Helen continues. "My stepfather has no friends. He fights with everyone. He is strong and gets angry quickly. Everyone is afraid of him. "

    "He has no friends at all?" asks Holmes.

    "No. He talks to no one except the gypsies. They are poor people who travel from place to place. A band of gypsies is staying on our land right now."

    "Are you and your sister afraid of the gypsies?"

    "My dear Mr. Holmes. You are making me so sad. My sister is dead. That is why I am standing here in this room."

    Boyan Slat has one huge goal. It's a goal that could be good for people and a {#blank#}1{#/blank#} all over the world. Amazingly, it looks like he's going to m {#blank#}2{#/blank#}his goal.

    When he was 16  Dutch engineering student Slat was on vacation in Greece, and he started to think about all the rubbish that is p{#blank#}3{#/blank#} onto beaches by water. The oceans around the world are all of plastic—millions of tons of plastic. Unfortunately, plastic doesn't just disappear. It takes c{#blank#}4{#/blank#} to break down (分解).

    The p{#blank#}5{#/blank#} situation of the oceans is bad and worrying and Slat wanted to do something to change it. So he made it a personal goal to clean up the rubbish in the world's oceans.

    Slat started with an idea for an unusual m{#blank#}6{#/blank#} to "catch" the plastic floating (漂浮) in the water using the natural energy of the ocean. He left school in 2013 to begin work on his project The Ocean Cleanup. Soon, the project r{#blank#}7{#/blank#} a lot of attention.

    A year later, he was leading a team of 100 scientists and engineers working on the invention. Slat needed money for this, so he started asking people to d{#blank#}8{#/blank#} to his project online and raised over $ 2 million!

    Soon after, Slat was named a "Champion of the Earth" by the United Nations for his meaningful and v{#blank#}9{#/blank#} work. It's the most important title the UN gives to people helping the environment. The Ocean Cleanup also won several awards (奖项) for having one of the best inventions of 2015. But the d{#blank#}10{#/blank#} goes on for Slat. He hopes that the oceans will be free of plastic in about twenty or thirty years.