All kinds of potential fads exist around us, but only certain ones take.

The passing grade is 11 in almost all schools and universities, while certain ones require 13.

We recommended advertising in all media, not just certain ones.

And why, of all the people in the crew, only certain ones were affected.

The company concluded that certain ones, like ginger, would not sell well in Europe.

She would not lay down the cards-but certain ones fell from her hands.

Item effects continue up until the player loses a life, but certain ones may last even longer.

No, but, oh there's certain ones we're not supposed to answer.

The early symptoms are unmistakable to me, I don't have to wait for the later, more certain ones.

What I can't figure out is how and why certain ones are so all of a sudden excess!