题目内容

听下面一段材料,回答第1-3题。
1. Where did the man work after he graduated from high school ?
A. In a company.        
B. In a lab.            
C. In a hospital.
2. How old was the man probably when he got his PhD ?
A. 16.                
B. 28.                
C. 36.
3.When did the man begin his research on the AIDS drug ?
A. When he worked in a lab.      
B. When he was at high school.      
C. When he worked at a company.
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