Story needs to be completed:
Betty had the ability to pick up the guitar and play well unlike Sarah, since

My choice:
Sarah was from a sporty family.

Story needs to be completed:
Samuel built the herbarium and Justin planted inside of it, because

My choice:
Samuel was better with building.

Story needs to be completed:
William made a pizza from scratch while Kyle did the dishes because

My choice:
Kyle was a worse cook.

Story needs to be completed:
The valet employee took the car keys of Benjamin before William because

My choice:
Benjamin was ahead of everyone in the line.