Our teacher often warns us on the road.A. to runB. runningC. not to runD. not run

网友回答

A. to run
B. running
(答案→)C. not to run
D. not run
解析：本题的含义是老师经常警告我们不要在道路上跑，warn sb not to do表示警告某人不要做某事，故本题选C。