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: Don's first day at the dock's had some hiccups. Sentence2: He was nervous being around heavy machinery. Sentence3: At one point he dropped a heavy shipment. Sentence4: It almost hit a fellow coworker.

Don knew he would have to improve.