Like someone was going to come down here with a key.

He let himself into the last one with a key.

We called her son and he came with the key.

He hadn't any idea of what to do with the key, and no one had thought to tell him.

The door could not be opened with just a key.

Now the only way to open them is with a key, which she has, and I don't.

The door is opened with a key from the outside.

They got to her room and she opened the door with the key.

He then sat himself down by the door, with the key in his hand, waiting.

I stopped at the office door with the key in my hand.