Answer: B) Had waited.
Explanation for this question is being written.
Answer: A) They had played soccer.
Answer: B) Played
Answer: A) Had studied.
Answer: A) Been
Answer: D) Had run.
Answer: A) Had taken off.
Answer: A) Had come.
Answer: C) Had completed.
Answer: B) Had read.
Answer: C) Palmer's father caught a foul ball before it hit him.
Answer: D) C
Answer: A) Yesterday
Answer: B) B
Answer: A) Had been.
Answer: C) Had left.
Answer: B) Had already left.
Answer: B) Had changed.
Answer: A) Had finished.
Answer: D) Had started.
Answer: B) Had ended.
Answer: C) Past perfect.
Answer: A) Past perfect.
Answer: B) Had
Answer: A) Had eaten.
Answer: D) Gone
Answer: B) No
Answer: B) Had contained.
Answer: A) Had
Answer: A) He had left before I arrived.
Answer: B) When I arrived at the station, the train had already left.
Answer: A) Had / cleaned.
Answer: A) Had already finished.
Answer: B) HAD
Answer: B) S + had + Verb(V3).
Answer: A) Had stopped.
Answer: A) They had eaten dinner.
Answer: B) Had finished.
Answer: A) I had eaten breakfast before I went to school.
Answer: A) Had never traveled.
Answer: C) Had
Answer: C) Had become upset.
Answer: C) Had quitted.
Answer: A) Was, had hurt.
Answer: C) Had already started.
Answer: C) It had a painful splinter.
Answer: D) Had written.
Answer: A) I had finished my homework when you arrived.
Answer: B) She had uploaded the video before the meeting started.
Answer: A) Had already left.
Answer: A) Realized had been.
Answer: B) Past Perfect.
Answer: B) Had eaten.
Answer: B) Had just had.