Sentence 1: Gavin was very sad when his best friend moved away. 
 Sentence 3: They decided to surprise him with a new best friend, a puppy 
 Sentence 4:  He came home from kindergarten one afternoon to his surprise 
 Sentence 5:  There was a little yellow bundle of fur waiting to greet him 
 Given Sentence 2: She told new friends it was her birthday.