[Q]: How does the sentence end?

Justin started guitar lessons yesterday, whereas Donald had been playing for ten years, so

[A]: Donald was an expert in their playing.

[Q]: How does the sentence end?

Tim was contemplating on taking his kids to the water park or the amusement park, but the

[A]: water park was too cold.

[Q]: How does the sentence end?

Nick was training Nelson on how to be a professional bowler, and soon

[A]:
Nelson was able to become better.