Answer: A) Had climbed.
Explanation for this question is being written.
Answer: A) Had hundreds of miles of roads built or repaired.
Answer: C) Had been.
Answer: A) Had completed.
Answer: A) Had left.
Answer: C) Had
Answer: C) Had forgotten.
Answer: C) Had dated.
Answer: A) Felt, hadn't eaten.
Answer: B) Had eaten.
Answer: A) Had + past participle.
Answer: B) I had gone running with my dad.
Answer: D) Was / had forgotten.
Answer: D) Had run.
Answer: D) Finished
Answer: A) Past Perfect Simple.
Answer: B) Had made.
Answer: D) Had long decayed.
Answer: C) Perfect
Answer: B) Had been stolen.
Answer: B) Had been, began.
Answer: C) Had studied.
Answer: B) Had launched.
Answer: C) Had left.
Answer: A) Had read.
Answer: A) Had
Answer: A) Had been painted.
Answer: A) Correct
Answer: A) HADN'T CHANGED.
Answer: B) Had left.
Answer: C) Had lived.
Answer: A) Had already started.
Answer: B) Had finished.
Answer: A) Hadn't taken off.
Answer: C) Had already left.
Answer: A) Past perfect.
Answer: A) She had observed the environment and climate change.
Answer: C) Had gone.
Answer: A) Had reached.
Answer: C) Already started.
Answer: A) Hadn't lost.
Answer: B) She had cooked dinner before I arrived.
Answer: B) Had already started.
Answer: B) Threw/had bitten.
Answer: A) Had already left.
Answer: A) Had worked.
Answer: C) Had finished.
Answer: A) Phoned / had gone.
Answer: D) Had finished.
Answer: A) Had studied.