Question

Her mother goes to work ______bus every morning.

Answer 1

为你解答。
Her mother goes to work （by） bus every morning.
她妈妈每天早上坐公交去上班。
解释：by bus，坐公共汽车。

Answer 2

Her mother goes to work （by） bus every morning.

Answer 3

by 乘坐。。。交通工具