Question

Our teacher often warns us ________ on the road

1. A.
   to run
2. B.
   running
3. C.
   not to run
4. D.
   not run

Answer 1

C
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。