Hi @Mary1541
It's always really distressing when this happens, especially when you don't see it coming!.
I've had a quick look at this review and you're right. it's not great. However all of your other reviews are lovely. I"ve also had a look at the reviews that this guest left for others and they were all very pleasant - he doesn't appear to be a serial negative reviewer, so it does seem as though he was genuinely unhappy ( who knows why? but airbnb will not take his review down)
I agree it was unfair for him to leave such negative statements without giving you any opportunity to address.
I think the only thing you can do now is to reply to his review. This is really more for the benefit of your future guests so it's VERY important that you ensure your reply is calm, factual, rational, polite etc etc.
Maybe something along the lines of "i'm so disappointed that you feel you did not have a 5 star stay like my other 34 guests. I'm even more disappointed that you did not raise any of these concerns with me when I touched base with you. I take my hosting very seriously and would have immediately addressed your concerns had I been given the opportunity." ( soemtimes future hosts read comments their potential guests have left for others - I do - and they will see his reivew and your reply and think twice about hosting him)
Other more expeirenced ( and more diplomatic) hosts will probably be along soon to offer advice re the wording.
Otherwise, take a deep breath and move forward. Soon this review will get buried under more positive ones. You'll feel bad for a couple of days, but then you'll get a great guest and this will just be a dim bad memory... Future guests reading your reviews will see that this is just a "once off" and will most likely take no notice, which is the important thing.