Answer: C) Had switched.
Explanation for this question is being written.
Answer: D) Had given.
Answer: A) They had left the party early.
Answer: B) Already started.
Answer: A) Had brought.
Answer: C) Had already eaten.
Answer: B) Had
Answer: C) Had gone.
Answer: A) Hadn't tidied.
Answer: A) I had gone shopping the day before.
Answer: A) Had started.
Answer: B) Incorrect
Answer: A) Had found.
Answer: C) Had already finished.
Answer: A) Past Perfect.
Answer: A) Had picked up.
Answer: A) We are already talking about the past and we talk about something that happened earlier in the past.
Answer: A) Had learned.
Answer: A) Past perfect tense.
Answer: B) True
Answer: A) Had seen.
Answer: B) Had researched.
Answer: B) Hadn't
Answer: B) Had saved.
Answer: A) Hadn't made.
Answer: D) Had cheated.
Answer: B) Had had.
Answer: A) Because something terrible had happened the day before.
Answer: D) Past perfect simple.
Answer: C) Hadn't finished.
Answer: C) Mellisa had had her breakfast.
Answer: D) Had poured.
Answer: C) Had cooked.
Answer: C) Spoke / hadn't finished.
Answer: A) Had, made.
Answer: A) Had hung.
Answer: D) Had received.
Answer: A) Had painted.
Answer: A) Had finished.
Answer: A) T
Answer: A) Had written.
Answer: B) Past perfect.
Answer: A) Had/played
Answer: B) INCORRECT
Answer: A) We had got.
Answer: A) I had learned.
Answer: A) Had / flown / visited.
Answer: A) Had graduated.
Answer: A) Hadn't even started.
Answer: A) Had already left.
Answer: B) Had already eaten.
Answer: A) True
Answer: C) By the time I was 22, I had already traveled to nine different countries.
Answer: B) False
Answer: B) Had lived.
Answer: C) Had already left London for New York.
Answer: A) Had completed.