It usually takes about ten minutes to school.A. by bikeB. on a bikeC. to rideD. ride

问题补充：

It usually takes about ten minutes to school.

A. by bike

B. on a bike

C. to ride

D. ride

答案：

A. by bike

B. on a bike

(答案→)C. to ride

D. ride

解析：by在表示交通方式时，后面直接接交通工具ride是动词，骑。句意：骑车到学校通常花费大约十分钟的时间。强调句式 It is adj for sb to do sth，做某事对某人来说怎么样。本句中it是形式主语，指代后面不定式内容做形式主语，故选C。