Problem: Continue the following story.

The man had to pay more taxes on the lotto winnings than the casino earnings. That's because the 
Here's how I want to continue it: casino earnings added up to a lower figure.

Problem: Continue the following story.

Katrina's home isn't nearly as clean as Elena's because 
Here's how I want to continue it: Katrina has always been a messy person.

Problem: Continue the following story.

Samuel did not know a lot of conversation topics like Brian because 
Here's how I want to continue it:
Brian always kept up with the news.