Answer: B) Past perfect.
Explanation for this question is being written.
Answer: A) She had watched a korean drama before she had an English online class.
Answer: A) Had left.
Answer: C) Past Perfect.
Answer: B) Had eaten.
Answer: B) Had seen her.
Answer: B) Had already started.
Answer: B) Had known him.
Answer: A) Had opened.
Answer: A) Had found.
Answer: A) Had had.
Answer: B) Past tense.
Answer: A) Had completed.
Answer: B) Had taken.
Answer: D) Had already left.
Answer: C) Had
Answer: D) A time earlier than before now.
Answer: B) I ate before school.
Answer: A) Had seen.
Answer: D) Past perfect tense.
Answer: C) Had had.
Answer: A) Past perfect, had.
Answer: B) She said she had gone to the market.
Answer: B) The party had already started when Jim and Pablo arrived.
Answer: B) Had left.
Answer: A) Had run out.
Answer: B) Had locked.
Answer: C) Had done.
Answer: B) Had
Answer: B) Had put on.
Answer: A) Had ever seen.
Answer: A) Had happened.
Answer: C) Had left.
Answer: C) He had finished his homework before dinner.
Answer: C) Had evacuated.
Answer: A) Had cut.
Answer: A) Had owned.
Answer: D) Had
Answer: A) Had filled.
Answer: B) Had repaired.
Answer: A) Had escaped.
Answer: A) Had already bought.
Answer: B) Had finished.
Answer: B) Had started.
Answer: A) She had led.
Answer: C) Had rained.
Answer: A) Came back/ had stolen.
Answer: A) Had
Answer: A) Had lost.
Answer: D) Had finished.
Answer: A) Had never seen.
Answer: A) Had already left.
Answer: D) Had gone.
Answer: A) Had written.
Answer: A) Had thought.