Where is the computer?
It's on the table.
What is it?
It's energy.
How can you save energy?
Turn off the fan.
???
turn off
What is it?
It's a tv.
How can you save energy?
Turn off the light.
Where is the light?
It's next to the computer.
How can you save energy?
Turn off the computer.
How can you save energy?
Turn off the tv.
Where is the fan?
It's next to the bed.
What is it?
It's a computer.
What is it?
It's a light.
???
turn on
What is it?
It's a fan.