—How do you get to school?—I .A. by subwayB. on footC. ride my bikeD. by bus

问题补充：

—How do you get to school?

—I .

A. by subway

B. on foot

C. ride my bike

D. by bus

答案：

A. by subway

B. on foot

(答案→)C. ride my bike

D. by bus

解析：不能用人称加介词短语直接回答交通方式，ABD都缺少谓语动词，故选C。