[ Tenses ]
Past simple, past perfect simple or past perfect continuous.
They ___ (train) all morning in the gym, which is why they ___ (be) exhausted.
A. had been training / were
B. had trained / had been
C. trained / had been being

Random Topics:
Adverb of FrequencyPast Simple Negative & QuestionsModals VerbsComparatives and Past Perfect TensePronouns ( Interrogative )Simple Present and Present ContinuousGrammar / PronounsVerb, Object, PrepositionSimple and Continuous Present TenseVerbsOther quiz:
Grammar › ViewDo not drink that milk because it _________ gone bad.
A. has
B. have
C. had
Vocabulary › View
This model is an … of our original product, designed for younger children.
A. affordable
B. reverse
C. adaptation