Расскройте скобки в past simple или в past perfect:
1. We (light) the candles because the lights (go off).
First action: ...
2. When i got home i (discover) that somebody (break into) my flat.
First action: ...
3. The patient (die) before the ambulance (reach) the hospital.
First action: ...
4. Billy (eat) all the cakes by the time the order children (arrive) at the party.
First action: ...