His only uncertainty was who that opponent would be.

The only uncertainties, they say, are the margin of victory and the next step.

The only uncertainty was the course he'd selected, but he decided even that was close enough.

But that was not the only uncertainty within the party.

The only uncertainty is: which one of us will be the first to break.

The only uncertainty is whether or not the people of Sentinius and the city itself will survive the experience.

His only uncertainty was whether the captain or the ambassador would have the last word.

He was the only uncertainty on the whole list.

The only real uncertainty will be how many of the government's allegations he supports.

The only uncertainty is when it will arrive, he said.