Toggle Navigation
Games
Blog
News
Class PIN
Join for Free
Sign in
Toggle Navigation
Games
PIN
Join for Free
Blog
Pricing
News
Contact us
Help center
Sign in
Study
Unit 9: Cities of the future
0
%
0
0
0
Back
Restart
People can develop health problems and become ill if they breathe ........................... (pollute) air.
polluted
Oops!
Okay!
We'll have better lives because there'll be no ................. (pollute)
pollution
Oops!
Okay!
Our city will be ............................ (sustain) in the year 2020.
sustainable
Oops!
Okay!
Your experience on this site will be improved by allowing cookies.
Allow cookies