Problem: Continue the following story.

Eric bought a new pet cage for a dog from Kevin since 
Here's how I want to continue it: Eric had a new dog.

Problem: Continue the following story.

The cool teenager preferred the jeans over the corduroys, although 
Here's how I want to continue it: corduroys were very trendy.

Problem: Continue the following story.

Robert was worried about Nick since his backpack was so heavy. 
Here's how I want to continue it:
Nick was given one with wheels.