[Q]: How does the sentence end?

The needle cannot be used on the fabric bought because the

[A]: needle is very weak.

[Q]: How does the sentence end?

Angela was diurnal while Erin was nocturnal so

[A]: Erin preferred to stay out late at night.

[Q]: How does the sentence end?

Sarah asked Katrina to help them learn to play the guitar because

[A]:
Katrina was a music teacher.