we usually go to school ____bus,but today we don`t____bus to school ,we walk to school.

问题描述:

we usually go to school ____bus,but today we don`t____bus to school ,we walk to school.

by take (a)A、by bus, by bus  B、take a bus,by a busC、by bus,take busesD、by buses take a bus   以上四个答案应该选哪个正确。请说一下理由。谢谢选C