The child has come to school by bike his own.A. inB. byC. onD. of

问题补充：

The child has come to school by bike his own.

A. in

B. by

C. on

D. of

答案：

A. in

B. by

(答案→)C. on

D. of

解析：句意:这个孩子独自骑自行车上学。 on one’s own 独自，单独；这是一个固定的短语，相当于alone。其他介词不能和own 组成短语。故选C。