You take the dog home.  It feels good to have some company with you while you  are walking home.  When you get home from school your mom screams, "I won't let that  dog in the house until I know it is a good dog!"

You sigh, "Okay. "Then you tie the dog to a tree so it won't run away while you do your homework.


Keep the dog.

or

Make posters to find the owner.