A {horrible|dreadful|terrible|frightening|awful} thought {struck|hit|occurred to|came to|flashed through} Harry, as {horrible|dreadful|terrible|frightening|awful} thoughts always do when you're {very|extremely|incredibly|particularly} nervous. {What if he wasn't {chosen|selected|picked} at all?|What if they {found|discovered} he wasn't {qualified|eligible} to be {chosen|selected|picked}?} What if he just sat there with the hat over his eyes for {ages|a long time|what seemed like forever|an eternity}, until Professor McGonagall {jerked|pulled|yanked|took} it off his head and {said|announced|declared} there had obviously been a mistake and he'd better get back on the train?
A {horrible|dreadful|terrible|frightening|awful} thought {struck|hit|occurred to|came to|flashed through} Harry, as {horrible|dreadful|terrible|frightening|awful} thoughts always do when you're {very|extremely|incredibly|particularly|truly} nervous. {What if he wasn't {chosen|selected|picked} at all?|What if they {found|discovered} he wasn't {qualified|eligible} to be {chosen|selected|picked}?} What if he just sat there with the hat over his eyes for {ages|a long time|what seemed like forever|an eternity}, until Professor McGonagall {jerked|pulled|yanked|took} it off his head and {said|announced|declared|told him} there had {obviously|clearly|definitely|undoubtedly} been a mistake and he'd better get back on the train?