Jack is a little boy, and he is only five years old. One day, he went to the cinema. It was his first time to do that. He was late. He bought a ticket quickly and ran into the cinema. But after two or three minutes he came out, bought a second ticket and ran into the cinema. After a few minutes he came out again and bought a third ticket. Two or three minutes later he came out and bought another ticket. Then the girl in the ticket office asked Jack." Why do you buy so many tickets? How many friends do you meet?" Jack answered, "No, I have no friends here. But a big boy always stops me at the door and tears my ticket".