He'd tell us how to live in a certain room.

He could very easily become lost, and wind up in a certain room.

On the top floor, the third one, he unlocked the door to a certain room.

It could be that, like the listening devices, only certain rooms were involved.

Animals would not stay in certain rooms for too long and even growl at nothing.

I did notice that a certain room holds a bed.

But the inside of a certain coveted literary room I have not yet seen.

It was later said that certain rooms were haunted by dead patients.

All the patients at a certain room in a hospital die from what appear to be natural causes.

When the girl was old enough to know right from wrong, the lady left, forbidding her to go into certain rooms.