You've got a key! Why have you been holding out on me?.
How long has he been holding out?.
Pack the boxes, but hold out a few blue ones for later.
I held out my hand, and the horrible, soft-spoken, eyeless creature gripped it in a moment like a vise. I was so much startled that I struggled to withdraw; but the blind man pulled me close up to him with a single action of his arm.
How long can they hold out without water?.