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a; The /; The / ;/ the; /
there was a special plant to treat the polluted air the city was away from the mainland people in the city did not burn oil or coal vehicles there were powered by electricity
how is the air polluted why the air is seriously polluted what can we do to prevent that bad weather what are the real reasons
a; The /; The / ;/ the; /
to pollute…take from being polluted ..be done to be polluted…be taken from polluted… be done
has, polluted have, polluting have, being polluted has, being polluted
a ; The ／; The / ; / the ; /
how is the air polluted why the air is seriously polluted what can we do to prevent that bad weather what are the real reasons
polluted, used to polluted, are used to polluting, used to polluting, are used to
free dirty polluted fresh
That; polluting Which; being polluted As; polluted It; to pollute
to pollute to be polluted from polluting from being polluted
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