Задание 1. Закончите предложения, поставив глагол в скобках в Past Perfect.

1. When a student entered the classroom, the lesson ... already ... . (start)
2. It was his first flight, he ... never ... before. (fly)
3. By the time we got to the cinema, the film ... already ... . (finish)
4. When parents came back home, children ... already ... to sleep. (go)