问题补充：
- ? - He’s a doctor.
A. Who is he
B. Where is he
C. How old is he
D. What does he do
答案：
A. Who is he
B. Where is he
C. How old is he
(答案→)D. What does he do
解析：情景交际。Who is he 他是谁； Where is he 他在哪；How old is he 他多大了；What does he do他做什么工作。根据答语的内容- He’s a doctor.可知答案为D，表示问某人职业的，故选D
