----does your mother do?----She is a teacher in a middle school.A. WhoB. WhatC. WhereD. Ho

问题补充：

----does your mother do?

----She is a teacher in a middle school.

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，她是一位中学教师。可知上文对人提问，故选B。