Answer: A) Had been learning.
Explanation for this question is being written.
Answer: A) Past perfect continuous.
Answer: A) She had been eating dinner at 7 p.m.
Answer: D) Had been painting.
Answer: B) Had been swimming.
Answer: B) Been waiting.
Answer: B) Had been playing.
Answer: D) Would have been working.
Answer: B) False
Answer: B) Had been eating.
Answer: B) Had been studying.
Answer: C) Had been studying.
Answer: C) Had/been studying.
Answer: C) How long had you been playing video games?
Answer: B) Had been waiting.
Answer: D) Had been watching.
Answer: C) Had been writing.
Answer: A) Had been waiting.
Answer: B) Had been standing.
Answer: D) He had been eating chocolate.
Answer: A) You'd been living.
Answer: A) Had been.
Answer: B) Had been repairing.
Answer: B) Past Perfect Continuous.
Answer: D) Had been playing.
Answer: D) Had been living.
Answer: B) Hadn't been.
Answer: B) Had been surfing.
Answer: B) Had been suffering.
Answer: A) Had been driving.
Answer: C) C had been practising.
Answer: C) Had been waiting.
Answer: C) Had been working as a waitress.
Answer: B) Had been studying / arrived.
Answer: A) Had been playing.
Answer: A) We drove for a long time before that moment.
Answer: A) Had been going out.
Answer: B) Had been reading.
Answer: B) Had been.
Answer: B) Had been offering.
Answer: B) Had been training.
Answer: D) Had been gathering.
Answer: D) Had been.
Answer: C) Had been preparing.
Answer: C) Hadn't been.
Answer: B) She was waiting/ she'd been waiting.
Answer: C) Had been playing.
Answer: A) I had been traveling .
Answer: C) Past perfect and past perfect continuous.
Answer: C) Had been working.
Answer: D) Past Perfect Continuous.
Answer: A) We hadn't been waiting long before the bus arrived.
Answer: C) Had been grazing.
Answer: A) Had-been waiting.
Answer: A) True
Answer: D) Past perfect continuous.
Answer: B) Had been walking.