Problem: How does the sentence end?

Nick loves cheesecake much more than Neil does because 
Answer: Neil doesn't have a sweet tooth.

Problem: How does the sentence end?

Laura always had more motivation in life and achieving goals than Katrina, as 
Answer: Katrina was lazy.

Problem: How does the sentence end?

Maria thought the pop star had a great voice but Katrina thought they sounded awful. 
Answer: Maria bought tickets to the pop star's concert.

Problem: How does the sentence end?

Jeffrey was able to perform a backflip but Nick was not because 
Answer:
Nick was very rigid.