When you lose your way in the city you can the policemen help.A. look; forB. find; outC.

问题补充：

When you lose your way in the city, you can the policemen help.

A. look; for

B. find; out

C. tell; to

D. ask; for

答案：

A. look; for

B. find; out

C. tell; to

(答案→)D. ask; for

解析：考查固定短语：ask sb for help表示向某人寻求帮助，句意：当你在城市里迷路的时候，你可以向警察寻求帮助。所以选D。