Question

I usually go to school ____my bike,but sometimes I go to school ___ foot

A.on;on B.on;by C.on with D.by;on

Answer 1

选A. on;on
by+交通工具这个是没错，但本句中出现了个my，所以情况就变不同了，只能用ON. 而后面那一空就一眼看出来了 固定词组：on foot步行

Answer 2

on，on

Answer 3

by+交通工具，on foot是固定搭配

Answer 4

by my bike
on foot

Answer 5

要么on my bike，要么 by bike。。没有by my bike的

on foot 固定搭配：步行

选A

Answer 6

A
on my bike=by bike.骑自行车。on foot步行