[ Grammar ]
My arms are aching now because _______________ since two o’clock.
A. I’m swimming
B. I swam
C. I swim
D. I’ve been swimming

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All, Both, Neither, None, EitherPast Perfect and Past Perfect ContinuousRelative Pronouns with PrepositionsVerb + Infinitive or GerundFuture Perfect vs Future ContinuousVerbal CommunicationSubjunctivesModifierswas werePast TensesOther quiz:
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