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