Problem: Continue the following story.

The doctor replaced the dirty carpet with stained concrete over the winter, the 
Here's how I want to continue it: carpet was old.

Problem: Continue the following story.

Patricia tries to cheer Samantha up after the news about needing braces, because 
Here's how I want to continue it: Patricia wants her friend to love herself.

Problem: Continue the following story.

The hat worn by Rachel was better received than the one worn by Carrie; this is because 
Here's how I want to continue it:
Carrie wore a hat supporting the rival team.