If you are _______trouble, you can ask the policemen __

试题详情及答案解析

If you are _______trouble, you can ask the policemen _______ help.

A．in, to	B．in, of
C．on, for	D．in, for

答案：D

试题分析：句意：如果你处于困境中，你可以向警察请求帮助。in trouble,处于困境中；ask sb for sth,向某人请求某物/某事。结合句意，故选D。
考点：考查介词的用法。