[ Tenses ]
“Could you turn off the stove? The potatoes ______ for at least thirty minutes.”
A. are boiling
B. were boiling
C. have been boiling
D. boiled

Random Topics:
Verbs: Action, Linking, and HelpingTenses and Passive VoiceAdverbs of Time and PlaceAdverbial PhrasesPassive Voice & TensesCorrelative conjunctionsAdjectives and PronounsVerb TensesAdverb Clauses of TimeComparatives, Superlatives & EquativesOther quiz:
Phrasal Verbs › ViewThe job offer was too good for him to turn_______.
A. down
B. out
C. off
D. away
Conditional Types › View
I would __________ a millionaire now if I took that job
A. be
B. been
C. being
D. had been