I go to school by but my best friend goes there foot. A. a bike; byB. bikes; onC. bike;

问题补充：

I go to school by , but my best friend goes there foot.

A. a bike; by

B. bikes; on

C. bike; on

D. bike; by

答案：

A. a bike; by

B. bikes; on

C. bike; on

D. bike; by

解析：句意：我骑自行车去上学，但是我的最好的朋友步行去上学。这里是固定短语by+表示交通工具的名词（用单数）；所以应该是by bike；on foot步行。故选C。