Grammar LV2 — Quiz — Day 2: Past Perfect

1 Complete: When I arrived, the train ___ already left. (had)
2 Which sentence shows one event happened BEFORE another past event?
3 Complete: She ___ her homework before dinner. (finish, past perfect)
4 Which is correct?
5 Rewrite: 'I never saw snow before that trip.' -> use past perfect: 'I ___ snow before that trip.'