32. Two middle-aged passengers fell into the sea. ____, neither of them could swim.
—Could you do me a favor? —It depends on _______ it is.
—It’s thirty years since we last met. —But I still remember the story, believe it or not,_______ we got lost on a rainy night.
______ you'll be able to succeed mainly depends on ______ you do and ______ you do it.
What you said just now ____ the matter we are discussing.
A library with five thousand books ______ to the nation as a gift.