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    Mick Polly，an owner of a toy store，lives with his teenage daughter Carolina in Kentucky．He is known as the Bike Man．Over the past five years，Mick has built hundreds of bikes for needy kids．

    One day in 2012，a 13﹣year﹣old boy with a broken bike walked by Mick's house．"I was working in my garage（车库），and he asked if I could fix it，"says Mick，now 53．

    The boy's bike had a broken wheel．Mick sent a post（帖子） on Facebook，asking his friends if they had the needed part．One friend saw the post and gave away two used bikes．Mick took parts from each to build a new set of wheels for the boy．

    Soon after，Mick repaired a bike for the boy's brother and fixed one for his sister．Word spread，and during the year，he had fixed up lots of bikes for local kids whose parents were not able to afford new ones ．

    "People are throwing away bikes day and night，"says Mick．

    Mick puts the bikes and bike parts in his garage．"I take off the good tires or the handlebars or the seats and use them，"he says．

    Up to now，the bike man has repaired hundreds of bikes and given away nearly 700newly repaired bikes．They're free，but the kids must agree to two things：They have to learn how to put waste things to good use and they have to try their best to study in school．

    If a kid's grades are low，Mick requires a teacher's note"saying that you're doing your best，"Mick says．Mick also hopes the bikes will get kids off the sofa．"When I was growing up，we all rode our bikes，"he says．"Hopefully these kids can get some exercise．"

    A beautiful and very successful actress played the lead role in a new musical show. Her home was in the countryside, but she did not want to go back there every night, so she bought an expensive house in the centre of the city, she got some beautiful furniture(家具) and had a man to paint the rooms in new colours.

    It was very difficult to get tickets for her show, because everybody wanted to see it. So she decided to give the painter two of the best seats. She hoped that this would make him work better for her. He took the tickets without saying anything, and she heard no more about them until the end of the month, when she got the painter's bill (帐单). At the bottom of it were these words: “Four hours watching Miss Hall sing and dance : 3 pounds,” with this note: “ After 5 p.m. I get 15 shillings (先令) an hour instead of 10 shillings.”

    A friend of mine named Paul received an expensive car from his brother as a Christmas present. On Christmas Eve when Paul came out of his office, a street urchin (顽童) was walking around the shining car. "Is this your car, sir?" he asked. Paul answered, "Yes, my brother gave it to me for Christmas."

    The boy was surprised. "You mean your brother gave it to you and it did cost you nothing? Sir, I wish…" He hesitated (犹豫). Paul thought of course he knew what the boy wanted, but what the boy said surprised him greatly. "I wish," the boy went on, "that I could be a brother like that."

    Paul looked at the boy in surprise, and then he said. "Would you like to take a ride in my car?" "Oh yes, I'd love to," the boy answered.

    After a short ride, the boy turned and with his eyes shining, said, "Sir, would you mind driving in front of my house?" Paul smiled a little. He thought he knew what the boy wanted. He wanted to show his neighbours that he could ride home in a big car.

    But Paul was wrong again. "Will you stop where those two steps are?" the boy asked. He ran up to the steps. Then in a short while Paul heard him coming back, but he was not coming fast. He was carrying his little crippled (残疾的) brother. He sat down on the step and pointed to the car.

    "There he is, Buddy, just like I told you upstairs. His brother gave it to him for Christmas and it didn't cost him a cent. And some day I'm going to give you one just like it. Then you can see for yourself all the nice things in the Christmas windows that I've been trying to tell you about."

    Paul got out and lifted the boy to the front seat of his car. The shining-eyed elder brother climbed in beside him and the three began an unforgettable holiday ride.

    Heroes come in all shapes and sizes. Many heroes are not even human, such as dogs, horses and cats. They are so brave and helpful that human beings are proud of them, too. Lucca, a 12-year-old dog, is a great animal hero. She is a retired US Marine Corps dog. On April 5, 2016 she received the Dickin Medal from PDSA in London, England. And PDSA will provide free medical care for the sick and wounded animals in need. The Dickin Medal was founded in 1943 by Maria Dickin. The Medal is the highest prize for animals working in wars in the world.

    Lucca is the first U.S. Marine Corps dog to receive the medal. As a search dog, Lucca's work was dangerous. She was trained to find hidden weapons and explosive devices. According to the US Marine Corps, Lucca protected the lives of thousands of soldiers, and no soldiers were killed while she was going around. She completed over 400 dangerous pieces of work during six years in Iraq and Afghanistan. In 2012, she lost her front left leg in an explosion while working in Afghanistan.

    Lucca is the 66^th animal to receive the Dickin Medal. 30 dogs (including Lucca) have got the Medal as well as 32 World War II messenger pigeons, three horses and one cat.