The door opened a crack, but he couldn't see the face of the man, the light being behind him.
After a moment, the door opened a crack, then more.
With the election, the wall had become a door, but it was only open a crack.
He held the door open a crack and looked through.
Sitting behind her is a white man with his window open a crack to the world outside.
After what seemed a long time, the door opened a crack.
The door opened a crack, and his voice filled the room.
She saw the door open a crack and made up her mind.
Instead, I heard the sound of a key, then the door opened a crack.
Just at that moment, the door to the back room opened a crack.