Teacher: Tom, why are you late for school every day?
Tom: Every time I come to the corner, a sign says, "School-Go Slow".
Mother: Why are you jumping up and down?
Tom: I've just taken some medicine and I forgot to shake the bottle。
Tom: William has asked me for a loan of five pounds. Should I be doing right in lending it to him?
Jack: Certainly.
Tom: And why?
Jack: Because otherwise he would try to borrow it from me.
