Possible Clues:

• "__, old chap!"
• Exclamation of surprise
• 'Goodness!'
• 'Oho, dear chap!'
• Ray Charles "What'd ___"
• '___ it's duck season ...': Daffy Duck
• 'Look here, old chap!'
• Words from Watson
• Words of surprise
• 'If you ask me . . .'