[Q]: How does the sentence end?

Brett had to ask Lawrence to burn a DVD of a movie to take on a plane, as

[A]: Brett had totally forgotten how to do it.

[Q]: How does the sentence end?

It took Jennifer days to finish her project, while Elena finished in mere hours, unusual since

[A]: Elena was usually the slow one.

[Q]: How does the sentence end?

The cookies had a crunchier texture than the brownies because the

[A]:
cookies had walnuts in them.