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: David asked his mother if he could pour his own drink. Sentence2: His mother agreed, but warned him to be careful. Sentence3: David accidentally knocked over his glass which shattered everywhere. Sentence4: His mother cheerfully forgave David.

David promised to be more careful in the future.