The bus stops at the bus stop. A mother and her child get on the bus and sit down. The conductor(售票员)comes to them for the tickets. The mother says," One ticket to the park, please. "The conductor looks at the little child, then says to him," How old are you, little boy?"
The mother wants to answer it. But the conductor stops her. The boy answers, "Mother says I'm four years old at home and two on the bus." All the other people laugh.
