All Mrs Smith's efforts to tidy the room were _____ because her grandson soon made a mess of it again.
—I'm sorry, but I didn't mean __________ out your secret. —But you know, letting out one's secret means __________ one's feelings.
Remember __________ the book when you have finished it.
—Robert is indeed a wise man. —Oh, yes. How I regretted __________ his advice!
Jiaxing is such a beautiful city that it is well worth __________.
You can't imagine the difficulty he __________ into the cold river and saving the drowning girl.