Answer: A) Past Perfect.
Explanation for this question is being written.
Answer: A) Had started.
Answer: C) Had already been sent.
Answer: A) Had met.
Answer: A) Had been begun.
Answer: A) Had got a cold.
Answer: D) Had had the pizza delivered.
Answer: B) Past perfect tense.
Answer: D) Had left.
Answer: A) Had joined.
Answer: A) Had believed.
Answer: A) As we had planned.
Answer: C) Had left.
Answer: B) Had forgotten.
Answer: A) Had already started.
Answer: A) Had missed.
Answer: C) Had walked.
Answer: C) Had heard.
Answer: A) Had just finished.
Answer: A) Had finished.
Answer: B) Had
Answer: C) Had lost.
Answer: A) Had just been on holiday.
Answer: C) Past Perfect.
Answer: A) Had
Answer: C) Had driven.
Answer: A) Had had.
Answer: B) Had lost.
Answer: C) Had
Answer: A) Had our computer experts run.
Answer: A) Had arrived.
Answer: A) Had lived.
Answer: B) Had retired.
Answer: A) Had left.
Answer: A) Had found.
Answer: A) As soon as the hurricane had passed, we inspected the damage.
Answer: C) Had never.
Answer: D) Had approved.
Answer: D) Finished
Answer: A) Had sung.
Answer: C) Had beaten.
Answer: C) He had been given.
Answer: C) Had eaten.
Answer: D) Had borrowed.
Answer: A) Old Flea.
Answer: B) Had already stopped.
Answer: D) Had killed.
Answer: C) Had already done.
Answer: A) Earlier
Answer: C) Had mentioned.
Answer: A) Three hours.
Answer: A) Past Perfect Tense.
Answer: B) Had given.
Answer: D) Had already decided.