-do you usually come to school?-- By bike.A. HowB. WhatC. How oftenD. When

问题补充：

---- do you usually come to school? ---- By bike.

A. How

B. What

C. How often

D. When

答案：

(答案→)A. How

B. What

C. How often

D. When

解析：How怎样;What什么;How often多久一次;When什么时候;根据下文, By bike乘自行车,可知上文提问交通方式,故选A.