[ Vocabulary ]
pollutants released into the air
A. emissions
B. smog
C. acid rain
D. sewage
Select your answer:

Random Topics:
Object PronounIdiom and TensesVocabulary and ModalsGrammar RulesPresent Verb TensesPast Perfect TensesGerund and InfinitiveModals Deduction: cant /mustHas Got & Have GotGerund - to InfinitiveOther quiz:
Phrasal Verbs › ViewThanks for pointing this out, John -otherwise we could have made a big mistake.
A. Look After
B. Point Out
C. Get Back To
Grammar › View
They saw a huge ship. The noun is….
A. saw
B. huge
C. ship
D. they
