— do you come to school on weekdays?— By bike.A. WhatB. WhyC. HowD. When

问题补充：

— do you come to school on weekdays?— By bike.

A. What

B. Why

C. How

D. When

答案：

A. What

B. Why

(答案→)C. How

D. When

解析：C 根据答语“骑自行车”可知，问的是怎样去学校。选C。