4 Fill in the past simple or the past perfect, then state which action happened first.

1. When I arrived (arrive) at the station, the train had left (leave). First action: had left. 2. We lit (light) the candles because the lights went (go off). First action: went. 3. When I got home I discovered (discover) that somebody had broken (break into) my flat. First action: had broken. 4. The patient had died (die) before the ambulance reached (reach) the hospital. First action: had died. 5. Billy had eaten (eat) all the cakes by the time the other children arrived (arrive) at the party. First action: had eaten.