— is the best student in your class?— Lisa.A. WhoB. WhatC. WhereD. When

问题补充：

— is the best student in your class?

— Lisa.

A. Who

B. What

C. Where

D. When

答案：

(答案→)A. Who

B. What

C. Where

D. When

解析：四个选项分别提问人、物、地点和时间，学生是人，所以选A.