[ Tenses Usage ]
Before renewable energy became affordable, most industries _____ on fossil fuels.
A. relies
B. relied
C. had relied
D. rely

Random Topics:
Grammar (Adjectives)PrepositionBASIC GRAMMAR - PRONOUNSIndefinite and Reflexive PronounsVocabullary TestQuestion TagConditional Sentence Type 0-3Prepositional PhrasesDEGREE COMPARISONCoordinating & Subordinating ConjunctionsOther quiz:
Articles › ViewWhat is _____ correct answer, twenty or twenty-five?
A. the
B. a
C. an
D. zero article
Idiom and Tenses › View
What does the idiom ‘the early bird catches the worm’ mean?
A. Those who wake up early have an advantage.
B. It’s better to sleep in.
C. Waking up early is not important.
D. Birds are always hungry.
Grammar › ViewIf your room ______________ (need) painting, what color would you choose?
A. needed
B. didn’t need
C. need
D. needing
Adverbs of Time › View
Identify the adverb of time:
Michelle will arrive any moment now.
A. will
B. now
C. arrive
