---Is Johnson on duty today?---It ________ be him, but I’m not sure.
The room is empty except for a bookshelf _____ in one corner.
I stopped the car ____ a short break as I was feeling tired.
________ at the cafeteria before, Tina didn’t want to eat there again.
If _____ to look after luggage for someone else, inform the police at once.
The sun began to rise in the sky, ________ the mountain in golden light.