阅读理解，根据短文内容选择正确答案。

A train stops at a station. A young man wants to come out, but it is raining. A girl is standing under an umbrella（雨伞）. The young man says to the girl, "Can you go and get me two hamburgers, one for you and one for me? Here are two dollars（元）. " "Great!" says the girl and she goes to buy hamburgers. After some time, the girl is back. She is eating a hamburger. "Where is my hamburger?" asks the young man. "Oh, there is only one hamburger left. So I'm eating mine. Here is your one dollar. "