The current Conference provided an unmissable opportunity.

As the World Turns is about to become unmissable.

Your last class today, is it incredibly, unmissably fascinating?

You guys made it sound so unmissable, And you set me up with a car seat and everything.

He called on the Democratic People's Republic of Korea immediately to return to the six-party talks, which provided an unmissable opportunity to minimize the nuclear risk posed by that country.