Answer: A) Had already gone.
Explanation for this question is being written.
Answer: A) I had finished my work when she arrived.
Answer: B) Had left.
Answer: A) Had finished.
Answer: C) Had
Answer: A) Had eaten.
Answer: A) Had been locked.
Answer: C) Had succeeded.
Answer: A) Had already been fixed.
Answer: D) Had flown.
Answer: D) Had died.
Answer: D) Had left.
Answer: A) Past perfect.
Answer: B) Past Perfect Tense.
Answer: C) Had brought.
Answer: A) Had been.
Answer: A) Had locked.
Answer: A) Had / been.
Answer: C) Had already started.
Answer: A) Drain
Answer: B) Had voted.
Answer: A) Had
Answer: C) Had lost.
Answer: A) The programm had already started.
Answer: A) Had just started.
Answer: A) Had taken.
Answer: D) Had never met.
Answer: B) Graduated, had been.
Answer: B) Past perfect.
Answer: C) She had studied English before moving to the United States.
Answer: D) Had gone.
Answer: B) Had been broken.
Answer: A) Had reached.
Answer: B) Had
Answer: E) Had been caught.
Answer: C) Wasn't/ had already been.
Answer: D) 'I had eaten before he arrived.'.
Answer: C) Had left.
Answer: D) Had made.
Answer: D) Had locked.
Answer: D) The week before.
Answer: C) Had changed.
Answer: B) Had traveled.
Answer: A) Had already left /rose.
Answer: B) Had given.
Answer: C) Had gained.
Answer: D) Had begun.
Answer: C) Had already left.
Answer: A) Had broken.
Answer: C) Had heard.
Answer: B) Had worked.
Answer: C) Past Perfect.
Answer: A) Had stopped.
Answer: B) Had never been.
Answer: A) Had had.