Q: 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.
Title: Skiing Challenge. Sentence 1: Zac thought he was the best at every athletic activity. Sentence 2: He and his new girlfriend went skiing together. Sentence 3: He challenged her to a race down the mountain. Sentence 4: He was shocked and angry when she beat him.
A:
He didn't know she had been a ski racer when she was a teenager.