No one could be sure at that time what was actually in the water.

And had been sure at many points that he wouldn't make it through.

I couldn't be sure of being around at the right time.

And I'm not sure at all of my legal right to practice here.

I could not be sure at first it really was you.

Are we really sure they could understand anything at all of our message?

He wasn't sure at the moment where that help was going to come from.

"So sure at such a young age of what his life would be."

When the night of the party came, I wasn't sure at all.

I'm quite sure at 8 pm you still would get one.