[ Tenses ]
They ______ for two hours when the power went out.
A. worked
B. were working
C. had been working
D. have worked
Select your answer:
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Countable - UncountableInfinitives or GerundsGrammar : can, could and be able toModals "Should"Subordinating and Coordinating ConjunctionsTransitional WordsPrepositions and ArticlesAdverb of FrequencyTenses & Passive
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…. everybody join the seminar yesterday?
A. Does
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