Do you go to school bike or foot?A. by; byB. on ;onC. by; onD. on; by

问题补充：

Do you go to school bike or foot?

A. by; by

B. on ;on

C. by; on

D. on; by

答案：

A. by; by

B. on ;on

(答案→)C. by; on

D. on; by

解析：by表示交通方式时后面直接接交通工具，on foot是步行的意思，以此选C。