Problem: Continue the following story.

A desktop computer is the right system for Mary instead of Kayla because 
Here's how I want to continue it: Mary works in the office all day.

Problem: Continue the following story.

When Steve went fishing he chose to use a rod instead of a spear because the 
Here's how I want to continue it: rod required simple fishing skills.

Problem: Continue the following story.

Leslie had clean and unstained elbows but not Robert because 
Here's how I want to continue it:
Robert didn't use a pumice stone to clean them.