He usually goes to school bike but sometimes he a taxi to school.A. with onB. on byC.

问题补充：

He usually goes to school bike, but sometimes he a taxi to school.

A. with, on

B. on, by

C. on, with

D. by, takes

答案：

A. with, on

B. on, by

C. on, with

(答案→)D. by, takes

解析：句意：他通常骑自行车去上学，但是有时他乘坐出租车去。第一空用by bike或on his bike都可以；but后的句子没有谓语动词，所以这里缺少动词，故用takes，故选D。