-- is that man over there?He is a doctor. A. WhoB. WhatC. WhereD. How

问题补充：

-- is that man over there?

--- He is a doctor.

A. Who

B. What

C. Where

D. How

答案：

A. Who

(答案→)B. What

C. Where

D. How

解析：Who谁； What什么；Where 在哪儿；How怎样。根据下文，他是一个医生。可知上文提问的是职业，what可以用来提问职业，故选B。