[ Past Perfect and Past Perfect Continuous Tense ]
Carlos _________ _________ ___________ all day, so he had a headache.
A. had worked
B. was working
C. has been working
D. had been working
Select your answer:

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Modal Verb, Passive VoiceArgumentative VocabularyRelative Pronouns and AdverbsPersonal Pronouns and VerbHave toAdjectives Ed and IngPossessive Adjectives & Possessive PronounsAdverbs, Modals, Preposition of timePast Simple (to be)Pronouns, Sentence Structure, and ApostrophesOther quiz:
Conjunctions › ViewWhat is the conjunction word in the sentence?
We can have your party at home or at the park.
A. and
B. but
C. or
Phrasal Verb › View
The ambassador was recalled when war broke___________.
A. out
B. off
C. away
D. down
