"yeah you should definitely tell me , '' i say with a smile and a lighthearted laugh hoping it will make him tell me his deep dark secret . '' you ca n't possibly be old enough to have a career . '' he makes this what-the-hell face and spills , '' i race motocross for a living . you can go pro at eighteen . it 's my first year of being a _ ..." What is the word in the blank space (_)? The answer is
pro