A woman is at the cinema, and she is enjoying the film very much, but there is a man in the next seat, and he begins looking at the floor under her. The woman is angry and asks，“What are you doing there？What are you looking for?” “A piece of chocolate.” The man says to her, “I drop（掉落）it on the floor.” “A piece of chocolate?” the woman says angrily, “It is dirty now. Take this and be quiet, please. I am listening to the film.” She gives the man a big piece of chocolate. But the man says, “One of my teeth is in the chocolate!”