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: My professor assigned my class an essay. Sentence2: By the time I left the classroom, I had forgotten about it. Sentence3: A few days later, my classmate messaged me to ask if I had done it. Sentence4: I was so upset because I had totally forgotten!

I was worried about my grade.