He usually goes yo school _____underground(地铁) a:by b:in原因

问题描述:

He usually goes yo school _____underground(地铁) a:by b:in
原因

a:by 表示通过某种方式

a

a:by
交通方式,常用BY

by in要用in the underground

选A
by underground = in a underground
另外:by bus= on a bus
by bike = on a bike
by ship = in a ship
by plane= on a plane
by train = on a train