[ Conjunctions and Preposition ]
Ways must be found to prevent the poisonous gases on / from polluting the air.
A. on
B. from

Random Topics:
Future Tenses and ModalsModals and TensesWould/would like - affirmative/negativeInfinitive and GerundsPronounciation and GrammarAdverbs and Time ExpressionsRelative Clauses PronounsConjunctions, Prepositions and InterjectionsPreposition and Preposition PhrasePassive SentencesOther quiz:
Grammar › ViewLast but not least is the most ________ construction in Germany.
A. photographing
B. photographed
Grammar › View
Can you please get the book from the top shelf for me? I ___ reach it.
A. couldn’t
B. can’t
C. don’t have to
