单项选择题

[听力原文] 6-7
W：Tom，(6) look at your shoes．How dirty they are!(6) 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 sch001．
M：I am hungry again．
W：Oh，hungry(7) But if I give you something to eat today, you will be hungry again tomorrow.

What did the mother ask Tom to clean（）

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