Problem: How does the sentence end?

Bill poured the cup of water into the bowl on the counter until the 
Answer: cup was empty.

Problem: How does the sentence end?

Training to become a firefighter suited Donald but not Benjamin because 
Answer: Benjamin doesn't work well under pressure.

Problem: How does the sentence end?

Working with their hands came naturally to Nelson but not to Aaron because 
Answer: Nelson was a carpenter.

Problem: How does the sentence end?

The woman believed the ruby was more valuable than the emerald, because the 
Answer:
ruby looked real.