Choose the correct verb for each sentence:

1. Before I ________ over, I will call you. a] came b] have come c] come
2. As soon as the singer _____ her song, the audience applauded. a] finishes b] finished c] finishing
3. The moment I _____ her, I will ask her. a] saw b] see c] was seeing
4. After I _____ the room, I turned out the lights. a] left b] leave c] was leaving
5. By the time I left my home, the mail carrier _____ the mail. a] had delivered b] have delivered c] delivers