Long long ago, there was no paper in the world. People had to write characters(汉字) in bamboo slips or stones.Then there was a man named Cai Lun who was a Chinese man. He made people use all kinds of things to invent paper. From then on, people can use paper to write on. Paper is a great invention. We always remember the great inventor Cai Lun. Nowadays paper is very useful in our work, study and our life.It really means a lot to human beings

    TWO English phrases show what people think about mice and rats: "As quiet as a mouse", and "a dirty rat".

    People think rats are dirty because they live in sewers(下水道) and other unclean places. They also carry diseases(疾病). Having a rat in your house is bad news. They smell terrible and make a lot of noise.

    Calling someone a "rat" in English means they are not to be trusted(信任). Saying "Rats!" is also a way to show that you are angry.

    Mice, on the other hand, are seen as quiet and cute. They live in fields and as unwelcome guests in people's houses. They are small and often kept as pets. Walt Disney's famous character Mickey Mouse helped make them lovable to children. Jerry, from the Tom and Jerry cartoons, is smart and naughty. It makes everyone happy.

    Rats and mice are both classed as rodents(啮齿类). But people think about them in different ways!

    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.

    I'll never forget that day on which my brother took me to stay at the street. Everytime I thought about his face, my heart shook strongly.

    "Got it? Just a couple of seconds later I will come back." Saying this, his figure went disappearing in the earth. At the same time I saw people sleeping with fear, suddenly realizing that persons didn't belong to anyone. And as time went by, I could never forecast(预想) what would be going on where I stayed.

    I watched the way my brother went on, thinking of something that happened when I was a kid. You know, I was not that outgoing, for which I always refused to talk to anyone including my parents. It is so weird that relations looked down on me and my parents ever sent me to the psychologist(心理医生). They never understood what I was really sick for.

    But something totally changed on a blue moon night. It's him, my brother. He knew the softest in my deep heart, being the first one to care for me. He would stay with me when my sleep was spoiled by horrible dreams; when I was down after something unpleasant occurred; when huge happiness surrounded(环绕) me and was needed to be spoken out to a listener. He gave me all these, on which the others didn't focus. I was moved.

    He always stayed. And kept staying. I was mixed in it. Which ever drove me crazy. But now I have to accept the truth that he has already gone. Like an opening petunias, come with charming smells, and then go with heart breaking. I don't feel sad, or any sense of bitterness. It's just like a two-people party, now it's time to end.

    Had someone given me a chance, could I let him stay? I think it's fate, unstoppable. His eyes are too small, not being able to fill me in. He's right. I shouldn't force him and myself.

    Today I live well. My life goes the right way. I will still miss him, imaging his life in heaven. Then it reminds me of that day. Eight years ago, he felt dying, then held me tightly, passing the beats and temperature to me. That street is in Wenchuan, on May 12th in 2008.