Problem: How does the sentence end?

Christopher was able to do a backward roll but Eric didn't dare try, because
Answer: Christopher was more flexible.

Problem: How does the sentence end?

Monica loved planes while Samantha hated to fly, so
Answer: Samantha never wanted to become a pilot.

Problem: How does the sentence end?

Of the two, Robert is less intelligent than Brian is. That's because
Answer: Robert dropped out of college.

Problem: How does the sentence end?

Michael said goodbye to Christopher, his best friend who was going to California to star in a movie, and
Answer:
Christopher was very excited.