Answer:
It's used when a speaker wants to signal that this particular question is the one that needs an answer to resolve a make-or-break situation. It's often used as part of a rhetorical question. i.e. there's no real answer to the question posed.
Answer:
Gies said she took the diary out of the desk where she'd saved it and she handed it to Otto Frank with the words: this is the legacy of your daughter Anne. She had never read a word of it, and in fact, could not bring herself to do so until after Otto Frank published the diary in 1947, two years after Anne's death.
Explanation:
