Past Perfect or Past Simple

We     (light) the candeles because the lights              (go off).

When I got home I            (discover) that somebody                 (break into) my flat.

The patient          (die) before the ambulance         (reach) the hospital.

Billy           (eat) all the cakes by the time the other children         (arrive) at the party.

Jessica looked at her watch. It          [was, had been]already 10:30 at night. She           [spent, had spent]all day writing her article, so it was no surprise she          [felt, had felt]so exhausted. Jessica              [stood up, had stood up]and            [looked, had looked]out the window. The street lights          [were, had been]on and the rain             [stopped, had stopped]. She             [wasn't, hadn't been]out all day, so she             [decided, had decided]to take a drive. Jessica          [felt, had felt]happy and relaxed. She finally              [finished, had finished]her article for the magazine. It           [took, had taken]her all weekend.