Possible Clues:

• 'It --' ('Who's there?' reply)
• ''It __'' (''Who's there?'' answer)
• ''It ___; be not afraid'' (Jesus)
• "It ___" (pompous arrival's declaration)
• "It __": formal "Who's there?" response
• 1996 grammar best-seller "Woe __"
• Grammar book, ''Woe ___''
• See 117-Down
• 'Woe ___' (humorous grammar book)
• ''. . . it ___'' (Book of Matthew)