Olympic Host Countries - Sudden Death

I see them hosting a Winter Olympics, especially as the format expands to not rely on one singular city as much. But summer is never happening unless it's after WW3

Pyeongchang 2018... The two Koreas did field one team together (women's ice hockey), and marched together in the opening ceremonies, but the Games were unequivocally hosted in and by South Korea. (source: Wikipedia)

A bit of some English terminology here... Great Britain refers to the island which contains Scotland, England, and Wales. It becomes the United Kingdom once Northern Ireland is included, then becoming a sovereign country.

Yes, a tricky one because a team from Great Britain, not United Kingdom, is represented at the Olympics. Team GB is almost identical to what might be called a Team UK, the only differences I can see being (1) Northern Irish athletes can choose between Team GB and Ireland, and (2) Team GB also covers Jersey, Guernsey and isle of Man, and most of the British Overseas Territories, none of which forms a part of the UK.

TBH not an easy one at all. It's over a century ago and Belgium has neither the elevations needed for the winter games nor a city nearly as large as those that currently get the summer games. I had a very similar country left to last but managed to guess correctly.

No. North Korea has never hosted.