Possible Clues:

• "Well ___!" ("Fancy that!")
• '-- Home for Christmas'
• "__ honest ..."
• 'Who'da thunk!'
• Common exclamation after 'Well'
• '-- right back'
• ''Well, don't that beat all!''
• 'Would you look at that?!'
• 'Would you look at that!'
• Words before a monkey's uncle?