Mother warned _______the electric lamp.

Mother warned _______the electric lamp.
A、not to touch
B、him not to touch
C、him not touching
D、him not touch
【正确答案】：B
【题目解析】：B不定式的否定式。warn sb.. not to do sth..属于固定搭配。意为“警告某人不要做某事”。