Problem: Continue the following story.

Joseph was a neat freak and Robert wasn't, which means 
Here's how I want to continue it: Robert never kept his area nice and clean.

Problem: Continue the following story.

Orchids are the favorite flowers of Randy but not Jason because 
Here's how I want to continue it: Randy grew up around them as a child.

Problem: Continue the following story.

Donald did a lot of research before writing a paper whilst Joseph did not because 
Here's how I want to continue it:
Joseph was very sloppy.