Problem: Continue the following story.

While redecorating her home, Rachel buys blinds to replace the curtains. The 
Here's how I want to continue it: curtains were old fashioned.

Problem: Continue the following story.

Monica bit their finger nail all the time but not Erin because 
Here's how I want to continue it: Monica had a nervous disposition.

Problem: Continue the following story.

Nick took his dog to obedience classes but Aaron refused to so 
Here's how I want to continue it:
Aaron had an agressive Pit Bull.