Definition: In this task, you're given a four sentences of story written in natural language. Your job is to complete end part of the story by predicting appropriate last sentence which is coherent with the given sentences.
Input: Sentence1: The mailman dropped off a box at Billy's home. Sentence2: The box was addressed to his roommate, Jeff. Sentence3: Billy tried to imagine what was inside the box. Sentence4: When Jeff got home he did not bother to open the box.

Billy wondered why Jeff wasn't as excited about packages as he was.