Problem: How does the sentence end?

Matthew loved to procrastinate on his final project for class but Robert worked hard on it, because
Answer: Matthew was lazy.

Problem: How does the sentence end?

I was listening to some music while swimming with my phone and headphone but the headphone later stopped working. The
Answer: phone is waterproof.

Problem: How does the sentence end?

Christopher knew a lot about electricity but Leslie did not since
Answer: Leslie studied botany in college.

Problem: How does the sentence end?

While playing footbal Felicia threw a pass that Betty caught to get the touchdown for her team.
Answer:
Betty was the catcher.