[ Word Form & Verb Tense ]
People can develop health problems and become ill if they breathe _____ air
A. pollution
B. to pollute
C. polluting
D. polluted
Select your answer:

Random Topics:
Have as verb and auxiliaryQuantifiersComparative and Superlative AdjectivesPrepositionQuantifiers with NounsMaritime Vocabulary and GrammarIrregular AdjectivesFuture PlansConjunctions & PrepositionsVerb TenseOther quiz:
Articles with Substances › ViewWhere is ___ butter? It was here a minute ago.
A. a
B. an
C. the
D. —
Preposition after some Verbs › View
What were they arguing _______?
A. at
B. about
C. of
D. in
