If (如果) you have problems (问题) you can ask Tom help.A. toB. onC. forD. in

问题补充：

If (如果) you have problems (问题)，you can ask Tom help.

A. to

B. on

C. for

D. in

答案：

A. to

B. on

(答案→)C. for

D. in

解析：句意：如果你有问题，你可以向Tom求助。ask sb for help向某人求助。ask sb for advice向某人征求意见。故选C。