Problem: Continue the following story.

Rebecca paid for Emily's dinner that night because 
Here's how I want to continue it: Emily was the only one that forgot to bring her purse with her.

Problem: Continue the following story.

The class took an exam in the classroom  instead of a quiz since the 
Here's how I want to continue it: exam was sooner.

Problem: Continue the following story.

Gator preferred adopting a puppy from a shelter to buying one from a shop. The 
Here's how I want to continue it:
shop had sicker animals.