Mum gave little Tom ten yuan. Then little Tom went shopping. He got on the bus and sat down next to an old woman. Then he saw the old woman's bag was open. There was ten yuan in it. He quickly looked into his pocket. The money wasn't there now! Little Tom was sure that the old woman was a thief(小偷). He decided to take back the money from the old woman's bag. So he carefully put his hand into the old woman's bag,took the money and said nothing. Suddenly the old woman shouted,“Where is my money? I can't find it. There is a thief in the bus.” Little Tom felt strange. Then he saw his own ten yuan under his seat. Little Tom is thinking a question now,“Am I a thief ?”