Answer: B) Had been living.
Explanation for this question is being written.
Answer: C) Past perfect-continuous.
Answer: A) Hadn't been expecting.
Answer: D) Was disappointed / had been eating.
Answer: D) Had been walking.
Answer: D) Past perfect continuous.
Answer: B) Had been waiting.
Answer: B) To indicate an action that was ongoing in the past until another past event interrupted it.
Answer: B) To show the result of a past action (the wet ground) was caused by a longer, continuous action (the rain).
Answer: C) Had been being tracked / was arrested.
Answer: D) Have closed-had preferred.
Answer: C) Had been cleaning.
Answer: C) Had been waiting.
Answer: B) Had not been paying.
Answer: A) Had been monitoring.
Answer: A) Had been training.
Answer: C) How long had you been studying before the exam started?
Answer: B) Had been playing.
Answer: D) D
Answer: A) Had been doing.
Answer: A) Had been playing.
Answer: B) She had been watching a sad movie before I arrived.
Answer: A) Had been making.
Answer: A) Had been studied.
Answer: B) She had been cooking dinner.
Answer: D) Had been using.
Answer: D) Had been running.
Answer: A) Had been sleeping/ arrived.
Answer: B) Had you been playing.
Answer: C) Had been playing.
Answer: D) Had been closed.
Answer: C) We had been waiting for you since morning.
Answer: B) False
Answer: C) Been + the-ing verb.
Answer: B) Had-been working.
Answer: D) Had you been learning.
Answer: C) Past Perfect Continuous.
Answer: B) Had been working.
Answer: B) Had been reading.
Answer: B) Had been thinking.
Answer: C) Had been working.
Answer: B) Hadn't been watching.
Answer: A) At 3 o'clock yesterday.
Answer: A) Had you been waiting.
Answer: B) Had Marina been living.
Answer: A) Had been planting.
Answer: D) Had not been cleaning.
Answer: C) Had been walking.
Answer: B) Had been.
Answer: A) Had been working.
Answer: A) Had been running.
Answer: B) Past perfect continuous.
Answer: B) Had been waiting/ arrived.
Answer: B) Had been doing.
Answer: A) Had been scrubbing / had.
Answer: D) Had been arguing.
Answer: C) Ps. Pf. C.