[ Grammar ]
Someone __ (go) into their room while they __ (sleep).
A. went – were sleeping
B. was going – slept

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Tenses › ViewPast 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
Grammar › View
You … study hard if you want to pass the exam.
A. Must
B. Can
C. Should
D. May
