over,across和through的区别和用法

题目

over,across和through的区别和用法
英语周报上面有这么一道题
—Look,the old woman is in the middle of the street.It's too dangerous.
—Let's help her____the road.
A.across B.through C.over
给的参考答案是A
我的意见是题目错了.A应该是cross

答案

选择A.
做prep.
你说的cross是做verb理解.
本人觉得选择A是没错的.
就像：let her into the house .
across和它差不多.