I have been told hundreds of times ________ the light with wet hands. [ ]

A. not to turn into

B. to not turn into

C. not to turn on

D. to not turn on

在空转过程中，钻机链轮的耐磨轴套与轴的磨损间隙不得超过（）。

A.2mm

B.4mm

C.6mm

D.8mm