The paint is still wet. ______!

The paint is still wet. ______!
A、Be not sure to touch it
B、Be sure not to touch it
C、Be sure to not touch it
D、Don’t be sure to touch it
【正确答案】：B
【题目解析】：be sure to do sth.表示“一定，千万”。它的否定是在不定式前加not。