Problem: How does the sentence end?

Adam learned to swim in college but Michael learned to bowl. 
Answer: Adam was able to save the drowning person.

Problem: How does the sentence end?

Rebecca was having an affair with Christine's boyfriend so 
Answer: Rebecca wished the couple would break up.

Problem: How does the sentence end?

James tried to prepare the school test paper by the exam date with his pen, but the 
Answer: pen ran out of ink.

Problem: How does the sentence end?

Neil was less accomplished at singing than Donald because 
Answer:
Neil lacked confidence on stage and was shy.