II. Решение:
- When we entered the classroom, we saw that somebody had broken the window.
- Before they went to the swimming pool, they had eaten breakfast.
- Yesterday Ben woke up.
- Sarah rode his bike to school.
- By the end of last year, I had found out that she had broken the window.
- When Alice had learned a lot of new English words, she met her teacher, she felt happy because she had won the competition.
- After my father had built the table, he put it in the kitchen.
Ответ: saw, had broken; went, had eaten; woke up; rode; had found, had broken; had learned, met, felt, had won; had built.