Possible Clues:

• "Do it, or __!"
• Ominous choice
• "When all ___ fails, read the directions"
• 'What __ can I do?'
• "Or __ what?"
• On the other hand
• ''Do it or ___!''
• "Can I get you anything ___?"
• 'If all __ fails ... '
• It may follow what