Answer: D) Had been raining.
Explanation for this question is being written.
Answer: D) Had been discussing.
Answer: B) Had been climbing.
Answer: A) Past perfect continuous.
Answer: B) Had been playing.
Answer: D) Had been watching.
Answer: B) Had been trying.
Answer: B) Had been living.
Answer: A) Had you been learning.
Answer: C) Had they been practicing their lines for the play?
Answer: B) Had been singing.
Answer: D) Had been waiting.
Answer: D) Had been writing.
Answer: A) He'd been joking.
Answer: C) Had been waiting.
Answer: D) Past Perfect Progressive.
Answer: A) Had been working.
Answer: D) Had been working.
Answer: A) Had been living.
Answer: D) Had been planning.
Answer: B) Had been sleeping.
Answer: B) Had been thinking.
Answer: A) They had been eating behind the house while tables were empty.
Answer: D) He had been painting his room.
Answer: C) Had been living.
Answer: B) Had been teaching.
Answer: D) Had been going.
Answer: C) Had been working.
Answer: A) For, since, before.
Answer: A) Had been playing.
Answer: C) Had been playing.
Answer: D) Had not been travelling.
Answer: B) Had been planning.
Answer: A) I had been reading for hours when he called.
Answer: C) I had been waiting.
Answer: A) Had been.
Answer: A) Landed/had been sailing.
Answer: D) Had been.
Answer: A) Hadn't been exercising.
Answer: A) Had been ignored.
Answer: A) Had been practising.
Answer: A) Past perfect continuous tense.
Answer: C) They were tired because they had been cleaning the garage all day.
Answer: A) Past Perfect Continuous.
Answer: C) Past Perfect Continuous.
Answer: A) Past Perfect Progressive.
Answer: D) Past perfect continuous.
Answer: D) Had been sleeping.
Answer: C) Been studying.
Answer: C) Had been cooking.
Answer: C) She had been writing the report for three days when her computer crashed.
Answer: C) Had been match-fixing.
Answer: A) Had been crying.