Given the task definition and input, reply with output. 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: Tim was frustrated because he had to still do his calculus homework. Sentence2: He looked at it for hours confused as to where to even start. Sentence3: He asked his father for advice. Sentence4: His father instructed him to go to a website with various tutorials.
Tim was able to grasp the concepts and receive a passing grade.