[ Vocabulary & Grammar ]
_______________ is harmful to tress and forests as it contains a high level of acid in the form of water vapour.
A. oil spill
B. fossil fuels
C. toxic waste
D. acid rain

Random Topics:
Offer and SuggestionPerfect Verb TensesGrammar and VocabulariesV-ing/to-VTravel VocabularyTransitive or Intransitive VerbsAntonymsDefinite vs Zero Article Abstract NounsVerb PhrasesIndefinite PronounsOther quiz:
Grammar › ViewDo you ……….up at seven o’clock?
A. have
B. get
C. do
D. go
Adverbial Clauses › View
He got a new alarm clock ……………….. he’d get up on time.
A. though
B. so that
C. so
D. as
Prepositions › ViewThe new policy resulted ___ an increase in productivity.
A. to
B. on
C. with
D. in
E. about
Conjunctions › View
Indicate the right conjunction: Andrea will cook dinner, __ Mauricio is going to buy the groceries.
A. and
B. but
C. or
