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: Kaleb was very curious about smoking. Sentence2: He had friends who smoked and often offered him cigarettes. Sentence3: He knew the health risks but he tried it anyway. Sentence4: Kaleb quickly became addicted to the nicotine.

He had to fight very hard to break the smoking habit.