The guard stopped at the fourth door on the left.

The guard took them through that door to another, stopped and knocked.

Two other guards stopped them at the entrance to the car.

Surely the guards won't stop us if they know we're leaving?

The guard stopped just inside the door and came to attention, his head bowed.

But the guard would stop him if he tried that.

When the two friends got to the hospital, a guard stopped them and asked what they were carrying.

The guards stopped him as he closed the door after her.

Finally, the guard stopped at a door, the only one with a marking on it.

The guard stopped at a closed door, on the left side of the corridor.