听下面一段材料,回答1-3题。 1. Where does the girl's uncle work? A. In a school. B. On a farm. C. In a factory. 2. Why did Mr. Gao leave school when he was young? A. His father was ill. B. He was ill. C. His family was poor. 3. What can we learn about Mr. Gao? A. He has worked in the factory for three years. B. He is good at inventing things. C. He never studies math.