[Q]: How does the sentence end?

Samuel failed their final exams while Brian passed them, so

[A]: Brian had no need to retake their classes in summer school.

[Q]: How does the sentence end?

Brett spent less money on the birthday gift than Nick because

[A]: Nick was better acquainted with the recipient.

[Q]: How does the sentence end?

Summers are easy for Kayla cause she doesn't work, while Laura has to work.

[A]:
Laura is a lifeguard.