[Q]: How does the sentence end?

Mary built a large shed all by them self but not Rebecca because 

[A]: Mary was very able.


[Q]: How does the sentence end?

Felicia has been chasing after Kayla after a long time and heard they were available and 

[A]: Kayla is trying to avoid them.


[Q]: How does the sentence end?

Although Ian was a better writer than Samuel, 

[A]:
Samuel was better at crafting a story.