— do you usually come to school?—By bike.A. HowB. What C. 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：

A. How

B. What

C. How often

D. When

解析：句意：--你通常怎样来学校？--骑自行车。A. How怎样；B. What什么；C. How often多久一次； D. When什么时间；根据答语By bike可知这里问句应该问的是方式，故选A。