-- How do you usually go to school Mary?----I usually go to school a bus.A. take B. b

问题补充：

---- How do you usually go to school, Mary?

----I usually go to school a bus.

A. take

B. by

C. on

D. with

答案：

A. take

B. by

(答案→)C. on

D. with

解析：句意：---Mary ，你通常怎样去学校？---我通常坐公共汽车到学校。take a bus 坐公共汽车，作谓语，by bus 坐公共汽车，做状语，on a bus坐公共汽车,由句意可知选C。

考点: 考查介词的用法。