Possible Clues:

• "___ death do us ..."
• 'It Ain't Over ___ It's Over'
• "Shop ___ You Drop"
• 'Shop ___ You Drop'
• Before, briefly
• "Do not open ___ Xmas"
• "'___ death do us part"
• ''___ death do us ...''
• Shortened preposition
• Up to the point that