Provide the correct tense forms for the given sentences.

Here's the solution for each sentence: 9. By ten o'clock the children had settled comfortably on the sofa and by ten they were watching a TV film. 10. When father came home, we had cooked the mushrooms which we had gathered in the wood. 11. When I saw Ann, she was sorting the flowers which she had picked in the field. 12. When I came home yesterday, I saw that my little brother had broken my pen and was playing with its pieces. 13. When I opened the door of the classroom, I saw that the teacher had already come and the pupils were writing a dictation.