The plants keep the buildings warm .......... winter
on
off
at
in
Let's ........... with this problem
started
starts
starting
start
The plants .............. carbon dioxide
eat
drink
sleep
absorb
We should ............. solutions to these problems
find
finding
finds
found
Air pollution is created ............ traffic
by
When you give a presentation , make .......... contact with the class
ear
eye
mouth
hand
Don't move around alot , keep your .......... in the same place
feets
eyes
legs
hands
Are there .............. questions
some
any
little
few
Air pollution is one of the .............. problems for people's health
big
biggest
small
bigger
The plants produce ...............
air
fossil
oxygen
carbon dioxide
The ........... make air pollution worse
clouds
rain
fossil fuels
trees
The plant help to ............ the air
clean
cleaned
cleaning
cleans
The plants also provide home ............ bees
of
for
Today , I'm going to talk ............. Air pollution
about
Thank you very .............
many
much
such
match