Раскройте скобки, используй пассивный залог.
1)The letter (to reseive) yesterday.
2)Mike's new book (to finish) next year
3) We (to invite) to a concert last Sunday
4)My keys always (to lose)

1)The letter was received yesterday.2)Mike's new book will be finished next year.3) We were invited to a concert last Sunday.4)My keys are always lost.5).... was translated.