Answer: C) Had finished.
Explanation for this question is being written.
Answer: C) Had met.
Answer: B) Had
Answer: A) Hadn't taken.
Answer: A) Had done.
Answer: B) Had waited.
Answer: B) Incorrect: " he had left" makes more sense.
Answer: B) Past perfect.
Answer: B) Had already studied.
Answer: C) Had cleaned.
Answer: B) Had ever seen.
Answer: A) If we hadn't overfished popular fish like tuna and cod.
Answer: C) Had lived.
Answer: B) Had / won.
Answer: D) I had never considered a different route.
Answer: D) Had forgotten.
Answer: C) Had psychological theories.
Answer: B) Had/cleaned
Answer: D) Had received.
Answer: B) Had made.
Answer: D) Had written.
Answer: B) Had prepared.
Answer: B) Had completed.
Answer: B) Would have paid-had booked.
Answer: B) Had already started.
Answer: D) Had lived.
Answer: B) Had gone.
Answer: A) Had recommended.
Answer: B) Had his wallet stolen.
Answer: B) Had been, died.
Answer: A) Had you seen.
Answer: E) -She knew that he was doing his homework at 7 o'clock.
Answer: C) Had written.
Answer: A) Had finished.
Answer: B) Had written.
Answer: B) Had eaten.
Answer: C) Had been sold.
Answer: D) Had seen.
Answer: B) Had finished.
Answer: C) Had announced.
Answer: A) Had broken.
Answer: C) Had already started.
Answer: D) Had got.
Answer: C) Had
Answer: B) Had died.
Answer: C) C
Answer: B) Had expected.
Answer: B) Had studied.
Answer: B) Had been baked.
Answer: D) Past Perfect.
Answer: B) Had been.
Answer: C) Had seen.
Answer: A) Eaten
Answer: C) Past perfect.
Answer: A) Had the food been.