Amy goes to school .A. by a bikeB. on bikeC. on her bikeD. ride a bike

问题补充：

Amy goes to school .

A. by a bike

B. on bike

C. on her bike

D. ride a bike

答案：

A. by a bike

B. on bike

(答案→)C. on her bike

D. ride a bike

解析：根据语境可知此句的含义是Amy去上学的方式。表示乘坐某种交通工具可以用介词by也可用介词in或on；和by 连用的交通工具前不用冠词， 但和in , on 连用时要用冠词或物主代词。根据分析可知只有C表达正确。