Answer: B) Had eaten.
Explanation for this question is being written.
Answer: C) Have given him a ride.
Answer: B) Hadn't done.
Answer: B) Had finished.
Answer: C) Had finished.
Answer: A) Had run.
Answer: C) Had
Answer: A) Had gone.
Answer: C) Hadn't locked.
Answer: C) Had examined.
Answer: C) Had operated.
Answer: D) Past Perfect Tense.
Answer: A) An action completed before a certain moment in the past.
Answer: B) Had been.
Answer: A) Had recovered.
Answer: B) Had passed.
Answer: B) Had invited.
Answer: A) Had watched.
Answer: B) Had taken.
Answer: A) Correct
Answer: A) Hadn't contacted.
Answer: C) Had become.
Answer: C) Had cancelled.
Answer: C) Had played.
Answer: D) Had studied.
Answer: A) Past perfect tense.
Answer: B) Past perfect.
Answer: B) Had prepared.
Answer: B) Had
Answer: A) Had finished.
Answer: B) Had left.
Answer: C) Past Perfect.
Answer: B) Had already done.
Answer: B) Had died.
Answer: C) Had obeyed.
Answer: B) I had a street cat groomed.
Answer: C) Had collected / would have been.
Answer: D) Had finished.
Answer: C) Had closed.
Answer: A) Hadn't
Answer: B) Had seen.
Answer: A) Had
Answer: D) Had left.
Answer: A) Had just bought, stole.
Answer: B) Had never traveled.
Answer: D) Hadn't
Answer: D) Had already finished.
Answer: A) There must be two past actions.
Answer: A) Had followed.
Answer: A) Past Perfect Tense.
Answer: D) Had taken.
Answer: C) Had left.
Answer: B) Had saved / crashed.
Answer: A) Had eaten.