David walked down the street. All he wanted to do was to play basketball with Jim. But his mother told him to return his sister's books to the library on his way to Jim's house.

    In his eyes, books and summertime just don't go together. He thought he had read a lot during the school year. And he had never set foot inside a public library. Today he'd just drop the books off in the outside return box, but it was locked. He had to go inside to return them.

David walked inside the building a few minutes before closing time. He put the books into the return box. After a quick drink of water and a short stop in the toilet, he'd be on his way to meet Jim. He walked out of the toilet. The library lights were turned off. He was locked — in a library.

David tried to use the telephone, but he couldn't find one. As the sun began to set, he searched for a light and found a little one on the desk. He used a pencil to write a note on a big piece of paper. It read, “I'm locked inside. Please call for help.” He put it on the front door. Surely, someone passing by would see it. He then turned his attention to the library itself.

    He was surprised to discover that this place was not so bad. Rows and rows of books! When he saw a book about Michael Jordan on the desk, he picked it up. He opened the book and began to read. He felt that being locked in the library didn't seem to be such a terrible thing.

    Two hunters rented(租用) a small plane to fly them to a forest. They told the pilot to come back and pick them up in about two weeks. By the end of the two weeks， they had hunted a lot of animals and they wanted to put all of them onto the plane.

    But the pilot said， “This plane can only take one lamb. You'll have to leave the others behind.”

    Then one hunter said， “But last year， another pilot with the same plane let us take two lambs and some other animals onto the plane.”

    So the new pilot thought about it. Finally he said， “OK， since you did it last year， I think this year we can do it again.” Then they put all the animals they had hunted onto the plane， and the plane took off. Five minutes later， it crashed.

    The three men looked around， and one hunter asked the other one， “Where do you think we are now?”

     The other hunter looked around and said， “I think we're about one mile away from the place where the plane crashed last year.”

    A long time ago, there was a man. He wanted to buy a pair of new shoes. He measured(量) his feet with a straw(稻草)，and then went to a shoe shop in town.

    The shopkeeper took out a pair of new shoes, and let him try it on. But when he looked into his pocket, he found that the straw was not there. So he said, “I'm sorry, I forgot to bring the size(尺寸) here! Let me go home to get it.” After that, he ran out of the shop. It was very far from his home to the shoe shop. When he got back home, he was out of breath.

    With a straw in his hand, he hurried to the shoe shop again. But the shop was closed.

    Someone near the man said, “Your feet are with you. Why don't you try which pair of shoes fits(合适)? And why do you believe your straw, but not your feet?”

    Karen lived with her parents in the Karoo Basin of South Africa. The Karoo was famous for plant and animal fossils(化石) ,Karen's father was a paleontologist(古生物学家) ,and Karen enjoyed looking at the dinosaur bones in his office. She hoped to discover her own dinosaur someday.

    Every summer, Karen's father invited paleontologists from around the world to the Karoo. As they hiked through the dry land, he would show them fossil samples(样本) within the layers of sedimentary rock(沉积岩) and ash.

    This summer, Karen asked her father if she could go along on the hike. He agreed, but he asked her to stay close by. As they drove to the trail(小径) ,Karen's heart beat quickly with excitement. There were so many places to visit.

    The hike was interesting, but Karen was too curious to stay on the trail. Without asking, she ran down into a nearby ravine(峡谷) and looked among the rocks, Then, he heard her father's voice calling to her. She ran up the side of ravine. Suddenly, she spotted something white and shiny. "Dad!" she shouted excitedly.

    Karen's father stood at the top of the ravine with the other people. They looked worried until Karen pointed to the shiny object. All the paleontologists examined it. They nodded to each other in surprise. It was the skull(骨头) of a dinosaur nobody knew about! The paleontologists took pictures and shook Karen's hands. Her father smiled, "Karen." he said. "You are now the youngest paleontologist in the Karoo!"

Nick is a 14-year-old schoolboy.  His  life  is  full  of exams  and  studies  on weekdays. He    has little free time.    He thinks playing computer games is the best way to relax. When he has free time, he sits in front of the computer. Just like that, he doesn't eat or drink for several(几个) hours.

Last weekend,he played games in front of the computer again.He was too excited and didn't want to move. He didn't have anything for six hours. When he had to go to the bathroom,he found he could not move. He was taken to the hospital. The doctor told him he should do some different kinds of activities. In other words,he needs more exercise to have a healthy body.

After coming back from the hospital, Nick follows the doctor's advice(建议).He often plays soccer with his friends. Sometimes he still plays computer games on weekends,but he never does it for long. Now, he lives a happy and healthy life.