—Look an old man is in the middle of the road. It’s too dangerous. —Let’s go and help hi

问题补充：

—Look, an old man is in the middle of the road. It’s too dangerous.

—Let’s go and help him go the road.

A. over

B. on

C. across

D. through

答案：

A. over

B. on

(答案→)C. across

D. through

解析：

试题分析: 句意：看，一个老人在路中间，太危险了。咱们去帮他过马路吧。 over在上方， on在……上面， across在表面穿过，through在中间穿过；穿过马路是从一侧到另一侧，故选C