Mr Smith works in a factory in the middle of the city. The factory is not far from his home. It is about 800 meters away. So Mr Smith doesn't go to work by bus. He usually goes there by bike, sometimes he walks to work. It takes(花费) him 10 minutes to get there by bike or 20 minutes on foot. He usually leaves home at ten minutes to eight. Today something is wrong with his bike. He wants to walk there. His work starts at half past eight in the morning and finishes at a quarter(一刻钟) to five in the afternoon.

    If you were to walk up Arthur Bonner and say, "Hey, Butterfly Man." his face would break into a smile. The title suits him and he loves it.

Arthur Bonner works with the Palos Verdes blues butterfly, once thought to have died out. Today the butterfly is coming back—thanks to him. However, years ago if you'd told him this was what he'd he doing someday, he would have laughed, "You're crazy." As a boy, he used to be "a little tough buy on the streets". At the age of thirteen, he was caught by police for stealing. At eighteen, he landed in prison for shooting a man.

    "I knew it had hurt my mom," Bonner said after he got out of prison. "So I told myself I would not put my mom through that pain again."

    One day he met Professor Mattoni, who was working to rebuild the habitat for an endangered butterfly called EI Segundo blue. He saw the sign "Butterfly Habitat" and asked, "How can you have a habitat when the butterflies can just fly away?" Dr. Mattoni laughed and landed him a magnifying glass, "Look at the leaves. I could see all these caterpillars on the plant." Dr. Mattoni explained, " Without the plant, there are no butterflies."

    Weeks later, Bonner received a call from Dr. Mattoni, who told him there was a butterfly that needed help. That was how he met the Palos Verdes blue. Since then he's been working for four years to help bring the butterfly back. He grows astragalus, the only plant the butterfly eats. He collects butterflies and bring them into a lab to lay eggs. Then he puts new butterflies into the habitat.

    The butterfly's population, once almost zero, is now up to 900. For their work, Bonner and Dr. Mattoni received lots of awards. But for Bonner, he earned something more: he turned his life around.

    For six years now Bonner has kept his promise to stay out of prison. While he's bringing back the Palos Verdes blue, the butterfly has helped bring him back, too.

    It's the day before school starts. Mum takes her three little boys, Jim, Bob and Tom, shopping for clothes and school things. There are so many people in the shopping center. "Stay with me, "Mum says. But it doesn't take a long time for her kids to go here and there.

    While Jim is trying on a new shirt, Bob goes away. He is thirsty and runs to buy three bottles of cola. While Bob is looking for a pair of shoes, Mum can't find Tom. He sees his classmate Jack, so he goes to talk with him. While Tom is choosing a schoolbag. Jim and Bob are out of sight(在视野之外). They drink too much cola and go to the bathroom(厕所).

    It's seven when they get home. Mum is really tired. She gets a pen and writes one rule(规定)on the list of "Family Rules"一Shop with one boy each time.

    This is Tom. He is a student. He is in Class Four, Grade Seven. There are 25 girls and 20 boys in his class. His English teacher is Mr. Zheng. He is about 31. He is a good teacher. The students all like him.

    Tom has a good friend. His name is Jim. He is from Canada. He is in Class Four, Grade Seven, too. Tom and Jim live in China now.

    Thomas Edison lit up the world with his invention of the electric light. Without him, the world might still be in the dark. However, the electric light was not his only invention. He also invented the motion picture camera and more than 1, 000 other things. About every two weeks he created something new.

    Thomas Edison was born in 1847. He attended school for only three months. His mother taught him at home, but Thomas was mostly educated. He started experimenting at a young age.

    When he was 12 years old, he became a newsboy on a train. experiments on the train in his spare time. Unluckily, his first work experience did not end well. They fired him when he accidentally set fire to the floor of the train. Then Edison worked for more than five years as a telegraph operator, but he continued spending much of his time in experimenting.

    Thomas Edison was totally deaf in one ear and hard to hear others, but he thought of his deafness as a blessing in many ways. It kept conversations of every 24 hours. Sometimes his wife had to remind him to sleep and eat.

    Thomas Edison died at the age of 84. He left a great many inventions that greatly improved the quality of people's life all over the world.