学进去

Mark Twain was an American 1．. One day he went to a city 2． train. He wanted to see one of his 3． there. He was a very 4． man. He usually forgot something. When he was on the train, the conductor(售票员) 5． him for his ticket. Mark Twain looked for his ticket here and there, but he couldn’t 6． it. The conductor knew Mark Twain. He said, “Dear sir. If you could find your ticket, please show it when you come back. It doesn’t matter.” “Oh, but it does,” said Mark Twain. “I 7． find the ticket. If I can’t, how can I know 8． I am going?”