Past Simple or Past Perfect Simple

Choose between the Past Simple or the Past Perfect Simple.

 1. The house was empty when I arrived home. Everyone out.

 2. When I got up, I had breakfast, then I out shopping.

 3. They weren't very hungry because they lunch.

 4. We got home at around 1 o'clock and then we lunch.

 5. When Mary saw the woman's face, she knew she her somewhere before.