[Q]: How does the sentence end?

The doctor said Laura's heart beat was fine but Sarah's was irregular. 

[A]: Sarah felt so anxious.


[Q]: How does the sentence end?

Jason could smell the age of a good cheese, unlike Hunter because 

[A]: Jason had very large nostrils.


[Q]: How does the sentence end?

Because Betty works diligently on homework but Rebecca skips them,  

[A]:
Rebecca always makes bad grades.