Review Unit 3 , exercice 3 (Stopwatch)

If we ____________________ changes now ,

we ____________________ ____________________ a difference .

We ____________________ have a lot less garbag e

if we ____________________ reusing and recycling mor e

And if we ____________________ earth - friendly - - without toxic chemicals or a large carbon footprint - -

companies ____________________ ____________________ more earth - friendly product s

If everyone ____________________ about the environmen t

the situation ____________________ ____________________ .