You (should / shouldn't) recycle glass, metal or paper.
should
You should give old _________ to charity.
clothes
We should ( cut down / plant ) trees because they produce O2.
plant
We should/ shouldn't turn off the lights when we don't use.
should
You should plant a _______.
tree
You should/ shouldn't turn off the tap when you brush your teeth.
should
We should/ shouldn't waste water if you want to protect the environment.
shouldn't
You should reuse _________ bags.
plastic
You should/ shouldn't recycle newspapers, card and cardboard!
should
We should/ shouldn't use public transportation.
should
You should/ shouldn't unplug the TV when you don't watch.
should
We should / shouldn't use paper bags to the environment.
should
You should't throw plastic into the ______.
sea/ocean
We ( should / shouldn't ) use solar energy.
should
You should recycle plastic, paper and ________.
glass
You should/ shouldn't turn off the light when you leave the room.
should