In this task, you're given the title of a five-sentence story and the first four sentences. Your job is to write the last sentence of the story such that it seamlessly connects with the rest of the story.
Q: Title: The Basement. Sentence 1: It was always so cold and dark down there. Sentence 2: Billy was too scared. Sentence 3: One day he built up his courage and went down into the basement. Sentence 4: There wasn't much down there at all.
A:
Billy learned that having courage is important.