Ответ:

1. By eight o'clock yesterday I had done my homework and at eight I played the piano. 2. By six o'clock father had come home and at six he had dinner. 3. By nine o'clock yesterday grandmother had washed the dishes and at nine she watched TV. 4. When I met Tom, he was eating an ice cream which he bought at the corner of the street. 5. When father came home, we were cooking the mushrooms which we had gathered in the wood. 6. When I saw Ann, she was sorting the flowers which she had picked in the field. 7. When I came home yesterday, I saw that my little brother broke my pen and was playing with its pieces. 8. When I opened the door of the classroom, I saw that the teacher had already come and the pupils were to writing a dictation. 9. When I came home, my sister was reading a book which she brought from the library. 10. When mother came home, the children were eating the soup which she had cooked in the morning. 11. When I rang up Mike, he still was learning the poem which he had begun learning at school. 12. When I looked out of the window, the children playing with a ball which Pete had brought from home.

Объяснение: