B:Oh.Mother,but I cleaned them only yesterday.
A:But they are dirty now.You must clean them again.
B:I don't want to clean them today. Even if I clean them today,they will be dirty again tomorrow.
A:OK,don't clean them then.
（ln the evening Tom came back from school.he was very hungry.
B:Mother,give me something to eat, please.
A:You had your breakfast in the morning, Tom, and you had your lunch at school.
B:But I am hungry now.
A:Oh,really? But even if Igive you something to eat today, you will be hungry again tomorrow.