To correctly fill in the blanks with the right form of the verbs in brackets, you need to use the Past Perfect tense where appropriate. The Past Perfect is used to indicate an action that was completed before another action in the past. Here's how each sentence should be completed:
She talked about the party she had arranged for the children who attended her Sunday-school classes.
- "Had arranged" is used because the arranging of the party happened before she talked about it.
Emma suspected he had arrived at the truth years ago.
- "Had arrived" is used because arriving at the truth occurred before Emma's suspicion.
Jack and Amelia were the only family she ever had.
- "Had" is used in the past perfect to indicate that Jack and Amelia were her family before any other events in the past.
She got dressed in the cotton shorts and top she had worn the day before.
- "Had worn" is used because she wore them before getting dressed again.
Mari glanced over at the clock. It was nearly nine. She recently had learned to tell the time.
- "Had learned" is used because learning to tell the time happened before she glanced at the clock.
Her words had touched the core of me, and I realized with a small shock how badly I had behaved, I had thought only of myself.
- "Had behaved" and "had thought" are used because these actions occurred before the realization.
They were truly good friends again, closer than they ever had been.
- "Had been" is used to show that their closeness was before they became truly good friends again.
It was lovely to hear her laugh again. He had not heard her laugh in years.
- "Had not heard" is used because the lack of hearing her laugh occurred before the present moment of hearing it.
The police cordoned off the street where the bomb had gone off.
- "Had gone off" is used because the bomb explosion happened before the police action.
The suspect refused that he had assaulted a policeman.
- "Had assaulted" is used because the assault, if it happened, would have been before the suspect's refusal.
The prisoner had spent almost a month digging a tunnel before the guards discovered it.
- "Had spent" is used because the digging happened before the discovery.
He said he was awfully sorry for the things he had done.
- "Had done" is used because the actions he was sorry for occurred before his statement of apology.
She seated herself in the chair Bill had pulled out for her.
- "Had pulled" is used because Bill pulled out the chair before she seated herself.
The tense, worried expression he invariably wore, had disappeared. Now it was smooth, free of pain and concern.
- "Had disappeared" is used because the expression disappeared before the current smoothness.
Roger guessed that she just had made a dreadful slip of the tongue.
- "Had made" is used because the slip of the tongue occurred before Roger's guess.
Before the mid-nineteenth century, no dentist had used anesthesia.
- "Had used" is used because it refers to the period before the mid-nineteenth century when anesthesia was first used by dentists.