It took her nearly an hour to walk ____ the main roada. across b. cross c. through d. over选C A不也是穿过吗?怎么不对呢?其他的呢

问题描述:

It took her nearly an hour to walk ____ the main road
a. across b. cross c. through d. over
选C A不也是穿过吗?怎么不对呢?其他的呢

through这个词 含有不是很容易能做到的意思,
强调有一定难度.
花了近一个小是才走过那条主街道.