[ Subject Verb Agreement ]
Reducing our carbon footprint ________ crucial for combating climate change.
A. is
B. are

Random Topics:
Time ExpressionsPast, Present, FutureConditionals / Unreal PastPast Simple & Past PerfectPhrase and ClauseModals Posibility and ProbabilityModal Verb, Passive VoiceConjunctions and Verb TensesAdverbial Clause / If / ComparativesSimple TenseOther quiz:
Grammar › ViewThe students, who hated writing essays, ___ surprised they enjoyed the essay’s topic.
A. was
B. were
Future Tenses › View
We ________ dinner at a seaside restaurant on Sunday.
A. will have
B. are going to have
C. are having
D. have
Modal Verbs › ViewThe answer _____ found in the textbook.
A. can be
B. could be
C. will be
D. should be
Grammar and Vocabulary › View
Robyn was ________ the bus this morning.
A. in
B. at
C. on