My father goes to work every day.A. by a bikeB. in a bikeC. on a bikeD. ride a bike

问题补充：

My father goes to work every day.

A. by a bike

B. in a bike

C. on a bike

D. ride a bike

答案：

A. by a bike

B. in a bike

(答案→)C. on a bike

D. ride a bike

解析：by在表示交通方式时，后面直接接交通工具。In表示在交通工具内部；on表示在交通工具上面；ride是动词，骑。句意：我们的父亲每天骑自行车去上班。结合语境可知本句不缺少谓语动词，自行车只能在上面，故选C。