Conversation 1
[听力原文] 6-7
W: Tom, look at your shoes. How dirty they are! You must clean them.
M: Oh, Mother, but I cleaned them only yesterday.
W: They are dirty now. You must clean them again.
M: I do not want to clean them today. Even if I clean them today, they will be dirty again tomorrow.
W: All right, then.
M: Mother, give me something to eat. please.
W: You had your breakfast in the morning, Tom, and you had lunch at school.
M: I am hungry again.
W: Oh, hungry But if I give you something to eat today, you will be hungry again tomorrow.

What did the mother ask Tom to clean（）