Problem: Continue the following story.

John broke the tablet when he placed the box on it not knowing the 
Here's how I want to continue it: tablet is fragile.

Problem: Continue the following story.

Because Brian lived in a very cold climate while Joel lived in a warm climate, 
Here's how I want to continue it: Brian had to dress in several layers.

Problem: Continue the following story.

The machine was difficult to use for Donald unlike Nelson, because 
Here's how I want to continue it:
Nelson has used it in the past.