I live on the twelfth floor of a building. One afternoon I am coming home from a friend's house. It is just after four o'clock. I get quickly into the lift and press Button(按钮) 12.

    The lift starts to go up, but very slowly. And then, half way up, it suddenly(突然) stops between two floors. I couldn't understand it. I press(按)an all the buttons from 1 to 14. I call for help very loudly. But nobody answers.

    Then suddenly the lights go out, and I am alone in the dark. I start to cry and beat the walls of the lift. I cry and cry until I have no voice left. Then, I feel hopeless, and press all the buttons with my open hands. And all at the same time, there is a bell far away. It rings and rings. It is the fire alarm(火灾警报). I think the whole building is on fire. I say to the God quietly, “Just get me out of here. I'll never be bad again.”

    Just then, I realize the lift is moving very slowly. On the ground floor it stops, and the door opens. A man is standing there. “How long have you been there? It is good that you press the alarm bell. But haven't you learned to read at your school? ” He points at a small piece of paper on the wall beside the lift. It says： “Attention (注意)： This lift will be stopped for repairs between 4 pm and 5 pm on Thursday, March 13.”

   There are some great scientists whose research has changed the whole world. Here are some of them.

    Treasure hunts have excited people's imagination for hundreds of years both in real life and in books such as Robert Louis Stevenson's Treasure Island. Kit Williams, a modern writer, had the idea of combining the real excitement of a treasure hunt with clues found in a book when he wrote a children's story, Masquerade, in 1979. The book was about a hare, and a month before it came out Williams buried(埋) a gold hare in a park in Bedfordshire. The book contained a large number of clues to help readers find the hare, but Williams put in a lot of "red herrings", or false clues, to mislead them.

    Ken Roberts, the man who found the hare, had been looking for it for nearly two years. Although he had been searching in the wrong area most of the time, he found it by logic(逻辑), not by luck. His success came from the fact that he had gained an important clue at the start. He had realized that the words: "One of Six to Eight" under the first picture in the book connected the hare in some way to Katherine of Aragon, the first of Henry VⅢ's six wives. Even here, however, Williams had succeeded in miss leading him. Ken knew that Katherine of Aragon had died at Kimbolton in Cambridgeshire in 1536 and thought that Williams had buried the hare there. He had been digging there for over a year before a new idea came to him. He found out that Kit Williams had spent his childhood near Ampthill, in Bedfordshire, and thought that he must have buried the hare in a place he knew well, but he still could not see the connection with Katherine of Aragon, until one day he saw two stone crosses in Ampthill Park and learnt that they had been build in her honor in 1773.

    Even then his search had not come to an end. It was only after he had spent several nights digging around the cross that be decided to write to Kit Williams to find out if he was wasting his time there. Williams encouraged him to continue, and on February 24th 1982, he found the treasure. It was worth £3000 in the beginning, but the excitement it had caused since its burial made it much more valuable.

    Most children love toys. But do you make your own toys? Seventh-graders at Central Middle

    School in Connecticut, US, really did. They made toys using a 3-D printer(打印机) in science class.

    They made a red and blue soccer table, a catapult(弹弓) and a scooter(踏板车).

    But these toys are not for themselves. They will donate them to poor children in Haiti. "By doing so, students feel that they can help others," science teacher Kate Bruzinski told the Greenwich Time.

    Bruzinski teaches the students how to use 3-D printers. They printed(打印) parts of toys. They worked in groups of four. It took them six to seven weeks to make the toys. They drew pictures for the toys, found materials(材料) and then built them.

    Soon, these toys will meet their owners in Haiti. Students are happy about that.