answer: #Person1# asks Tom to clean his shoes, but he refuses because he cleaned them yesterday, so #Person1# refuses to offer food to Tom for the same reason.
documents: #Person1#: Tom, look at your shoes. How dirty they are! You must clean them.
  #Person2#: Oh, mum, but I cleaned them only yesterday.
  #Person1#: They are dirty now. You must clean them again.
  #Person2#: I do not want to clean them today. Even if I clean them today, they will get dirty again tomorrow.
  #Person1#: All right, then.
  #Person2#: Mum, give me something to eat, please.
  #Person1#: You had your breakfast in the morning, Tom, and you had lunch at school.
  #Person2#: I am hungry again.
  #Person1#: Oh, hungry? But if I give you something to eat today, you will be hungry again tomorrow.