Answer: B) Had done.
Explanation for this question is being written.
Answer: D) Had seen.
Answer: D) Hadn't received.
Answer: B) Had assembled.
Answer: C) Past Perfect.
Answer: B) Had eaten.
Answer: A) Had watched.
Answer: C) Had rung.
Answer: D) Had spent.
Answer: B) Had cleaned.
Answer: A) Had studied.
Answer: A) Had she learnt.
Answer: B) Had lost.
Answer: C) We had covered.
Answer: B) Had really intended.
Answer: B) Had gone.
Answer: B) Had visited-past perfect.
Answer: C) Had sent.
Answer: C) Hadn't paid.
Answer: B) Had been.
Answer: C) Had finished.
Answer: B) Was / had studied.
Answer: D) Had already become.
Answer: C) Had recorded.
Answer: A) Hadn't paid.
Answer: A) Had gone out.
Answer: B) Had happened.
Answer: B) Had died.
Answer: B) Had you lived.
Answer: B) Had started.
Answer: B) Had never been.
Answer: A) Had never flown.
Answer: D) I had been.
Answer: A) Had sent.
Answer: A) Had left.
Answer: C) Had studied.
Answer: C) Hadn't
Answer: B) Had ended.
Answer: B) Had already started.
Answer: A) Had just cleaned.
Answer: B) Had been informed.
Answer: A) Had been warned.
Answer: B) Hadn't called.
Answer: A) Past perfect.
Answer: B) Had left.
Answer: C) Had been.
Answer: B) Had arrived / fell.
Answer: B) Had already departed.
Answer: A) Past Perfect Tense.
Answer: B) Had
Answer: B) Hadn't had.
Answer: C) Had blown.
Answer: D) Had gone.
Answer: C) Got, had started.
Answer: C) Had come.