You must go（ ）the road carefully because the traffic is heavy

题目

You must go（ ）the road carefully because the traffic is heavy
1.crossing
2.across
3.cross
4.past

答案

2
go是动词,后面不可能在用实意动词cross
而arcoss貌是介词吧.通常有 go across the street的用法
好像没听过go past此说.