Problem: Continue the following story.

Matthew worked in a greenhouse while Samuel did not since 
Here's how I want to continue it: Matthew had all of the right educational qualifications necessary to work there.

Problem: Continue the following story.

Neil was very talkative but Samuel was very shy so 
Here's how I want to continue it: Neil naturally had many friends.

Problem: Continue the following story.

Since the girl was an introvert she chose to play on the slide instead of the merry-go-round because the 
Here's how I want to continue it:
merry-go-round was crowded.