Answer: A) Had opened.
Explanation for this question is being written.
Answer: D) Had started.
Answer: C) Had been.
Answer: C) Had
Answer: B) Had left.
Answer: B) Had been.
Answer: A) NO CHANGE.
Answer: C) Past perfect.
Answer: A) Was, had worked.
Answer: C) Had considered.
Answer: A) Maria was happy because she had gotten a new puppy the day before.
Answer: A) Had
Answer: B) Had forgotten.
Answer: C) S + had + V pp + C.
Answer: B) Had already started.
Answer: A) Correct
Answer: C) Had trained.
Answer: B) Had seen.
Answer: A) Past Perfect.
Answer: C) Had practiced.
Answer: B) When I got to the party, they had already eaten the cake.
Answer: D) Run into.
Answer: C) Had started.
Answer: B) He had finished his homework before he went to play.
Answer: C) Had left.
Answer: A) Had gone.
Answer: D) Had called.
Answer: A) Had replied.
Answer: B) Had been that day.
Answer: B) They have eaten dinner.
Answer: C) Subject + had + verb (past participle) + complement.
Answer: B) Had had.
Answer: C) Had saved.
Answer: A) Had bought.
Answer: A) It shows something was done before something else happened.
Answer: C) Had been conducted.
Answer: C) Had shown.
Answer: C) Had died.
Answer: B) Had + past participle form of the verb.
Answer: A) Had made.
Answer: A) Arrived-had already left.
Answer: C) I seen that movie before.
Answer: D) Had ended.
Answer: A) Had started.
Answer: C) Had finished.
Answer: A) Had been sold.
Answer: B) Had already had.
Answer: C) Had already started.
Answer: B) Past perfect.
Answer: A) Had studied.
Answer: B) Had explained.
Answer: A) Had been checked.
Answer: B) Had believed.
Answer: A) Had broken.