[ Grammar ]
After many years of unrestrained carbon emissions, many scientists believe we are on the _____ of an ecological catastrophe.
A. Precipice
B. Fated
C. Access
D. Reprieve

Random Topics:
If/Unless - Conditional type 1Grammar - PunctuationComparisionsZero Conditionalgoing toParticipal PhrasesTenses (Present, Past, Future Forms)Independent and Dependent ClausesFuture Continuous TenseWord FormationOther quiz:
Grammar › ViewWe saw a ______ of buffaloes grazing in the field.
A. herd
B. army
C. group
D. litter
Grammar › View
Select the prepositional phrase: By noon, all the runners were finished.
A. By noon
B. All the runners
C. The runners
D. Were finished
Quantifiers › ViewThere aren’t …………… apples in the fridge.
A. many
B. much
C. a lot of
D. lots of
Simple Present Tense › View
Cheetahs _________ the world’s fastest land animal.
A. is
B. are
