Раскройте скобки употребляя глаголы в past simple либо past perfect 1)

Раскройте скобки употребляя глаголы в past simple или past perfect
1) I (to do) my homework? (to clean) my room and then (to go) for a walk
2) the man arrived at the station but the train (already leave)
3) By the time Jenny got to the party most people (to go) home
4) When I (to come) home, my mother already (to cook) dinner