Sentence 1: The mailman dropped off a box at Billy's home. 
 Sentence 3: Billy tried to imagine what was inside the box 
 Sentence 4:  When Jeff got home he did not bother to open the box 
 Sentence 5:  Billy wondered why Jeff wasn't as excited about packages as he was 
 Option 1: The box was addressed to his roommate, Carl. 
 Option 2: The box was addressed to his roommate, Jeff.