Решение:
Чтобы раскрыть скобки, нужно поставить глагол в нужную форму. Чаще всего это инфинитив или форма прошедшего времени, в зависимости от контекста.
- The letter (to receive) → The letter is to be received.
- Mike's new book (to publish) → Mike's new book is to be published.
- We (to invite) to a conference → We were invited to a conference.
- My keys always (to lose) → I always lose my keys.
- This text (to translate) → This text is to be translated.
Ответ: is to be received; is to be published; were invited; lose; is to be translated.