A farmer had a brother in town who was a gardener, and his brother had a garden full of the finest fruit trees. So his skill and his beautiful trees were famous everywhere. One day the farmer went into the town to visit his brother, and was surprised at the trees that grew quite well.

      "Look, my brother," said the gardener. "I will give you an apple tree, the best from my garden, and you, and your children, and your children's children will enjoy it."

       Then the gardener called his workmen and ordered them to take up the tree and carry it to his brother's farm. They did so, and the next morning the farmer began to wonder where he should plant it.

"If I plant it on the hill," he said to himself, "the wind might catch it and shake down the delicious fruit before it is ripe. If I plant it close to the road, passersby will see it and take away the apples--but if I plant it too near the door of my house, my children may pick the fruit." So, after he had thought the matter over, he planted the tree behind his barn (谷仓).

      Time passed, but the tree had no fruit the first year, nor the second-then the farmer called his brother. When the gardener came, the farmer said angrily, "You have cheated me, and given me a useless tree instead of a fruitful one. This is the third year and still it brings out nothing but leaves! "

      The gardener laughed and said, "See where the tree was planted, it has no sun or warmth. How could you expect flowers and fruit?"

    It was a rainy night in New Orleans, US. At a bus station, I watched a young girl cry as her baggage(行李) was taken down. It seemed she'd lost her ticket. She begged the bus driver not to leave her behind.

     “Losing your ticket is like losing your money,” the bus driver said, and left her in the rain.

But then an old man stood up and blocked the driver's way. “How can you leave that girl out there? You know she had a ticket. You can't just leave her here. You can't leave her in a city where she doesn't have a friend. You will meet your schedule, but she might meet her end.”

      The driver showed no sign that he'd heard or even cared about the young girl's problem, or how her travels went.

    So the old gentleman said, “I'll pay for her fare. I'll give her a little money to help her on her way.”

    He went and bought the ticket for the girl. “How can I repay the kindness you've shown tonight?” She asked. “We're strangers who won't meet again. A mere 'thank you' doesn't seem right.”

    The old man said, "What goes around comes around. I've learned this with time. Whatever you give, you always get back. Always be helpful to others and give what you can spare.”

根据短文理解，选择正确答案。

    Billy Dengler, a 14-year-old boy, is in the eighth grade. When he was born a month later, Billy's mother, Terri, noticed that his eyes weren't quite as big as a normal baby's. She took Billy to the hospital, and the doctor said Billy would never be able to see.

    Although Billy can't see, he has never let that hold him back or make him different. Billy began teaching himself computer programming by using a screen reader when he was just seven years old. He is a certified Google developer (谷歌认证开发者) now. Google even tried to offer him a job last year when he discovered a problem in one of its systems, but Billy wasn't old enough.

    Billy's dream school would be Stanford University or MIT, where he could get a very good education in computer science. After he leaves school, whether he will go to work at a company like Google or design a software company of his own is still to be decided. However, he says he will definitely (绝对地) do something great.

    "It's a sighted world," Billy said. "You can't let anything get in the way of your dreams, and if you do that, you can't move forward and make your dreams come true."

    Mr Brown is a famous doctor. He lives in Sydney with his wife and three children. His wife's father, Mr Black, lives with them too.

    Mr Black is too old to work and he always sits in his chair near the bed all day; but in spring, if the weather is nice, he will sit outside. Sometimes, he even takes his chair into the garden if it is warm enough.

    Recently, Mr Brown found that spending more than three hours playing outside every day can reduce a child's risk of becoming short-sighted. It challenges the people's belief that short-sightedness is caused by using electronic products or reading in weak light. Many people come to see Mr Brown and ask him why Mr Brown shows his research and believes that natural light has a special chemical which stops the eyeball from growing out of shape and prevents people from becoming short-sighted.

    Mr Brown's oldest son, Andersen Brown, is twenty-seven. He is also a doctor like his father. He agrees with his father's idea and he suggests that everyone should spend some time outside. It doesn't matter that time is spent in travelling, playing sports outside or just sitting outside like his grandfather.

    Mr Brown's oldest daughter, Wendy Brown, is twenty-four. She is a music teacher. She teaches students in a junior high school. She likes teaching very much. She thinks those teenagers are very lovely.

    Mr Brown's youngest son, Mike Brown, is not old enough to go to work. He still goes to school. He is a very clever and hard-working boy. He is good at studying. He wants to be a scientist when he grows up.

    Davy wants to join the pet (宠物) club of his school, but he doesn't have a pet. What can he take to the club? It isn't easy for him to find a pet. One day, he sees a caterpillar (毛毛虫) in front of the classroom. It's small and green. Davy loves the caterpillar very much. "I will call you Caty，" says Davy. Davy takes his caterpillar to the pet club. Some children are talking about their pets.

    "My dog can swim," says Bob.

    "My cat can dance," says Jane.

    "My bird (鸟) can sing with me," says Ray.

    "My caterpillar can walk," says Davy.

    But he can't find Caty. He looks for it everywhere. Where does Caty go? Davy doesn't look very happy. One day, he plays with his friends in the school. A butterfly (蝴蝶) stands on his head. Oh, it is Caty and it is back. It's now a butterfly.