We can use ...
led lamps.
We can unplug the ...
cellphone.
We can use ...
led spotlights.
We can turn off the ...
lamp.
We can use ...
natural light.
We can take a ....
bus
We can turn off the ...
lights.
We can unplug the ...
T.V.
We can walk ....
to school.
We can walk ...
to work.
We can take a ...
train
We can use...
roller skates.
We can ride a ...
a scooter.
We can ride a ...
bike
We can turn off the ...
washing machine.
We can unplug the ...
laptop.
We can unplug
the radio.
We can walk ...
to the mall.
We can use a ...
skateboard.
We can turn off...
the blender.