Problem: Continue the following story.

The wheels on the truck were worse than the tires on the car because the 
Here's how I want to continue it: tires were lightly used.

Problem: Continue the following story.

Robert could move very fast but Jeffrey could not as 
Here's how I want to continue it: Jeffrey was really very unfit.

Problem: Continue the following story.

Kayla was better at maintaining good grades than Jessica because 
Here's how I want to continue it:
Jessica liked to party with her friends.