–Please remember _________the light when you leave the room.

–OK, I will.

A．to turn off         B．turning off         C．to turn on          D．turning on

Be sure ________ the light when you ________ the room．

1. A.
   turn off; leave
2. B.
   to turn off; leave
3. C.
   turn on; leaved to
4. D.
   turn off; will leave