[Q]: How does the sentence end?

William went to school after hours to ask Eric for help him familiarize himself with the required texts,

[A]: Eric knew the texts intimately.

[Q]: How does the sentence end?

Adam was playing outside while Joel was watching TV,

[A]: Adam was definitely the energetic brother.

[Q]: How does the sentence end?

Brett had many more friends than Kenneth had because

[A]:
Brett was nicer to other people.