- do you study for a test?---By reading the textbook.A. WhatB. WhenC. HowD. Where

问题补充：

--- do you study for a test?

---By reading the textbook.

A. What

B. When

C. How

D. Where

答案：

A. What

B. When

C. How

D. Where

解析：句意：你是如何为考试复习的？通过朗读课本。What什么When什么时候How如何Where哪里。根据By reading the textbook.可知问的是方式，故选C。