_______________ 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:
Vocabulary › ViewMy grandmother used vivid blue __________ to knit a scarf for me.
A. strands
B. weave
C. yarn
D. spinning
Wish Clause › View
Situation :
Rahma’s father has given her permission to walk to the mountain. Gibril is happy for her and expresses his hope that she will have a safe trip.
The conversation:
Rahma: “Thank God. Finally my father let me go to the mountain walk.”
Gibril : “______________________. Have a safe trip.”
A. I am happy for you
B. Wish me happy
C. Thank you very much
D. I hope so
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
