Ответ:

Не уверенна, что всё правильно >_<

1. Came / had left

2. visited / had lived

3. entered / had already begun

4. came / had gone

5. had studied /  entered

6. thought / had already gone

7.  I hadn't seen / met

8. had left /  had

9.  spent /  felt  / wanted

10. spoke / had never heard

11. had stopped / looked

Объяснение: