Mark Twain was an American writer. One day he went to a city by train. He wanted to see one of his friends there. He was a very busy man. He usually forgot something. When he was in the train, the conductor asked him for his ticket. Mark Twain looked for the ticket here and there, but he couldn't find it. The conductor knew Mark Twain. She said, "Show me your ticket on your way back. And if you can't find it, it doesn't matter." "Oh, but it does."said Mark Twain. "I must find the ticket. If I can't find it, how can I know where I'm going?" 帮忙把较难懂的语法结构变简单点,使原意不变,改正里面的语法错误。七年级水平,控制在100词之内,再译出汉语。 要是好再加分,多谢了!!!