One day mother looked at Mike's shoes and said,“Mike, look at your shoes. How dirty they are! You must clean them.”“Oh, Mum, but I clean them only yesterday.”said the boy. “They are dirty now. You must clean them again.” “I don't want to clean them today, even if I clean them today, they will be dirty again tomorrow.”

　　Mike's mother thought for a moment and said,“All right, don't do it then.”

　　In the evening, Mike came back from school. He was very hungry, “Mother, give me something to eat, please.”he said.“You had your breakfast in the morning, Mike, and you had your lunch at school,” his mother said.“I am hungry again,” cried the boy.“Oh, hungry? But if I give you something to eat today, you will be hungry again tomorrow.”