When you leave, don’t forget ___ off the light.

A. turning    B. turned   C. to turn   D. turn

Don't forget ________ the light when you leave the classroom.

A. to turn off

B. turn off

C. turning off

D. turned off

Don't forget ________ the light when you leave the room.

A. turn off

B. to turn off

C. turning off

D. turned off