Answer: D) Had turned.
Explanation for this question is being written.
Answer: D) A
Answer: B) Had lost.
Answer: B) Had been done.
Answer: D) Had sung.
Answer: B) I had traveled to many countries.
Answer: C) Hadn't slept.
Answer: A) Had found.
Answer: C) Had written.
Answer: B) Had already seen.
Answer: A) Hadn't contacted.
Answer: D) Had written.
Answer: A) Had
Answer: C) Had
Answer: A) True
Answer: C) She had walked to school every day when she was young.
Answer: A) Had forgotten.
Answer: B) Had had.
Answer: A) Had hidden.
Answer: C) Had already eaten.
Answer: A) Had read.
Answer: C) Shaken
Answer: A) Past Perfect.
Answer: A) Got, had lost.
Answer: C) Had gone.
Answer: A) Had locked.
Answer: C) Pluperfect active.
Answer: A) Had taken.
Answer: A) Had run.
Answer: A) Had already eaten.
Answer: B) Had seen.
Answer: B) She had already completed her homework when her friends arrived.
Answer: D) Had eaten.
Answer: A) I had been wounded.
Answer: D) Had put.
Answer: C) Had been.
Answer: C) Had the carpets cleaned.
Answer: A) Had already finished.
Answer: A) Had graduated.
Answer: A) Had been.
Answer: A) Hadn't slept.
Answer: B) I had played tennis.
Answer: A) Had had.
Answer: A) Had seen.
Answer: A) Were / had already started.
Answer: B) Had explained.
Answer: C) Had stopped.
Answer: A) Had started.
Answer: A) Yes, it's correct.
Answer: C) Had it stolen.
Answer: B) Had lived.
Answer: B) Pluperfect
Answer: B) Past perfect.
Answer: B) Had completed.
Answer: A) Had broken.
Answer: C) They had played soccer before it started to rain.