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.

Sentence1: The teacher gave us an assignment. Sentence2: Everyone finished the assignments, 20 minutes before the bell rung. Sentence3: My teacher wrote another assignment on the board. Sentence4: My friend got mad and flipped her desk over.
She walked out of the class.