A train stops at a station (车站). Lots of people get off to buy something or h1． a rest. A young man wants to buy something to e2．, but it begins to r3．. He doesn’t want to get off the train. He sees a boy standing under a big u4．.
The young man says to the boy: “Can you go and g5． us two hamburgers, one for you and one for m6．? Here are ten dollars.”
“Great” says the boy. He goes to buy the hamburgers. After s7． time, the boy is back. He is eating a hamburger. “W8． is my hamburger?” asks the young man. “Oh, there’s o9． one hamburger left (剩余). I’m eating mine. Here is f10． dollars for you.
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