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