[Q]: How does the sentence end?

Aaron was piloting the airplane while Ian offered support, so 

[A]: Ian was eager to help.


[Q]: How does the sentence end?

Nick offered to help Dennis to learn the Korean language because 

[A]: Dennis was from the United States.


[Q]: How does the sentence end?

Because Nelson had trouble sleeping while Craig went to bed early, 

[A]:
Nelson woke up exhausted.