A woman was at the cinema, and she was enjoying the film very much. But there was a man next to her, and he began looking for something on the floor. The woman was angry and asked, "What are you doing there? What are you looking for?" "A piece of chocolate," the man said to her. "I dropped(掉落) it on the floor." "A piece of chocolate?" the woman said angrily. "It isdirtynow. Take this and be quiet, please. I am enjoying the film." She gave the man a big piece of chocolate. But the man said, "One of my teeth(牙齿) is in the chocolate on the floor!"