I went to the park yesterday.A. on a bicycleB. by the bicycleC. in a bicycleD. by bicycle

问题补充：

I went to the park yesterday.

A. on a bicycle

B. by the bicycle

C. in a bicycle

D. by bicycles

答案：

(答案→)A. on a bicycle

B. by the bicycle

C. in a bicycle

D. by bicycles

解析：乘坐某种交通工具 on＋贯词＋交通工具，by＋交通工具单数只有A项符合