One day Mr Li and Mr Wang went to London to see a friend. They didn't know much English and they knew little about London. They didn't find their friend's home. They walked in the street for a long time. Then they saw a man near a shop. They went up to him and asked the way. The man smiled but said nothing（什么都没说）. Then he put his hand into his pocket and took out a book and wrote, "I am sorry, I can't hear. "At last they found their friend's home with the help of a policeman.
