помогите пожалуйста!!!

Ответ: 2. 2.By twelve o’clock everyone had already come home.

3. 3.Before the doctor went home he had examined all his patients.

4. 4.Before he began to read the book he learned something about its author.

5. 5.By the end of the week they had already passed all the exams.

6. 6.By that time they had already traveled all over whole Europe.

7. 7.By the time our parents came we had already served the table.

8. 8.Up to that moment she had prepared for the interview.

9. 9.When Nick rang me up i had already written an essay.

10. 10.By Sunday he had prepared his report for the conference.

11. 11.By the end of the school year we had learned all the rules.

12. 12.By the time the teacher asked me i had already learned everything.

Объяснение: