Problem: Continue the following story.

Kyle used the soap to give Neil a bath after they got dirty, since 
Here's how I want to continue it: Neil was a messy child.

Problem: Continue the following story.

Jim started drinking fresh water instead of artificial soda pops because the 
Here's how I want to continue it: water was healthy.

Problem: Continue the following story.

Nick knew the answers in advance, while Benjamin did not, because 
Here's how I want to continue it:
Nick had studied their textbook.