[Q]: How does the sentence end?

Mary never did as well on tests in high school as Lindsey because

[A]: Lindsey always paid attention in class.

[Q]: How does the sentence end?

Rebecca wanted lots of embroidery on the walls of the house but Monica disagreed, since

[A]: Rebecca liked how it looks.

[Q]: How does the sentence end?

Adam was playing outside while Joel was watching TV,

[A]:
Joel was definitely the lazy brother.