It's important to ............. plastic
wait
cycle
throw
recycle
............ can make water pollution
plastic
flowers
trees
plants
I ............ an email to my uncle soon
am sending
sent
is sending
send
What is he ............ now ?
doing
did
do
does
............ can be dangerous when there is too much in the air
carbon dioxide
oxygen
recycling
climate change
What is she ............. ?
can read
reads
read
reading
Scientists are ............ new forms of renewable energy
discovering
discover
discovered
discovers
we 're talking ............ popultion
about
in
to
with
Now , he ............. for the bus
waits
waited
is waiting
They ............ helping the environment
is
isn't
am
are
............. are made by factories , car and lorries .
rain
wind
fuel
emissions
He ............ a football match now
is watching
watch
watched
watches
She is ............. gloves
wore
wears
wearing
wear
They ........... picking up the garbage
don't
aren't
dosen't
I ............... walking to school
were