Sentence 1: Gina had thrown a book at a boy in her class. 
 Sentence 3: The teacher asked her why she threw the book 
 Sentence 4:  Her explanation was not good enough 
 Sentence 5:  Gina was sent to see the principal 
 Option 1: He had been bothering her for hours. 
 Option 2: The boy didn't do anything to deserve the book being thrown at him.