— do you go to school every day?—By bus.A. How B. WhyC. WhereD. When

问题补充：

— do you go to school every day?

—By bus.

A. How

B. Why

C. Where

D. When

答案：

(答案→)A. How

B. Why

C. Where

D. When

解析：考查疑问词的用法。根据答语的“by bus”可知，在提问交通方式，用疑问词how提问。