Problem: How does the sentence end?

At the recital, Rachel's music doesn't sound as good as Natalie's because 
Answer: Rachel hasn't practiced much.

Problem: How does the sentence end?

Justin got the job that Kyle had also applied to because 
Answer: Kyle was worse at talking in the interview.

Problem: How does the sentence end?

Carrie was not adventurous and never had fun like Felicia, due to 
Answer: Carrie being a boring person.

Problem: How does the sentence end?

Jeffrey suspected Adam had an addiction to pain pills, so 
Answer:
Adam did not receive anymore pills.