Відповідь:
1. He has lost all his money.
2. I've written my English essay.
3. I've bought a new book.
4. My sister has started a new job recently.
5. We have already finished our shopping.
6. They have lived here for a long time.
7. Your friend has just phoned.
8. Oh no! I've broken my window.
9. Someone have eaten my apple.
10. Mr. and Mrs. Jackson haven't seen the new film yet.
И так, и так будет правильно:
haven't seen - сокращение от have not seen
Пояснення:
В каждом предложении мы использовали Present Perfect.
Почему?
1) В предложениях не указано точное время, что позволяет нам использовать Present Perfect.
2) Контекст предложений намекает нам на результат.
3) Слова-маркеры Present Perfect: just, yet, fora long time, already.