From Longman Dictionary of Contemporary Englishit’s a wonder (that)it’s a wonder (that)especially spokenSURPRISED used to say that something is very surprising It’s a wonder no one got hurt. → wonder
Examples from the Corpus
it’s a wonder (that)• It's a wonder no one got hurt.• But it's a wonder he doesn't.• She thought, as she spoke, it's a wonder that I have anything to report.• Pretty deep there; it's a wonder it didn't slice the top of his head off.• Though it's a wonder she did not spot the writing on the wall.• The way Max's biological clock is ticking, it's a wonder Emma didn't call out the bomb squad. 