Problem: How does the sentence end?

Kenneth was good at karate while Eric had trouble doing the kicks. 
Answer: Kenneth was naturally talented.

Problem: How does the sentence end?

The man tried to hide the ring inside the box but the 
Answer: box was too small.

Problem: How does the sentence end?

The group decided to make some donations to the group instead of the building because the 
Answer: building was unnecessary.

Problem: How does the sentence end?

Adam is diabetic while Hunter is healthy and really loves sugar, 
Answer:
Adam has to take care of his sugar levels.