African elephants are a(n) __________. We need to protect them.
a funny species
endangered species
If a(n) .........................wakes up, then there will be an eruption.
active volcano
sleeping volcano
He doesn't drive to work. He uses __________ instead.
a spaceship
public transportation
Dinosaurs are ............................. animals.
endangered
extinct
We shouldn't ..............................energy.
use
waste
A supervolcano can cause .............................................
harm to Vietnam.
worldwide damage.
If global warming continous birds will lose............................
their new iphones and ipads.
their habitat.
You should ......................... made of paper or plastic to reduce the amount of garbage that we all produce.
volunteer to recycle objects
throw out objects
My friend................. to help with the cleanup campaign to keep our streets clean.
stayed at home
signed up
They .................... this new campaign about using the 3Rs to reduce garbage in landfills.
volunteered to
volunteered for
You don't need to worry.
I'll do it.
Never mind.
Sorry, but I'm working on something and I can't do anything else.
I'm busy.
I'm spending my free time playing games.
We could ask them to come with us, too.
They can join in.
They can't come with us.
Kathy signed up for the soccer team this year.
Kathy volunteered to help the soccer team this year.
Kathy put her name down to join the soccer team.
