Problem: How does the sentence end?

Donald's car started, but Nelson's car did not, because
Answer: Donald put his spark plugs in correctly.

Problem: How does the sentence end?

Kayla dated many more people at once than Betty, because
Answer: Kayla was in an exclusive relationship.

Problem: How does the sentence end?

The boy played the game for longer than he watched television because he thought the
Answer: game was fun.

Problem: How does the sentence end?

Bobby's hunting career took off when he dumped his bow for a gun, since with the
Answer:
gun he hit his target more often.