11. What you (to do) here at such a late hour? You (to write) your composition? — No, I (to write) it already. I (to work) at my report. — And when you (to write) your composition? — I (to finish) it two days ago.

What are you doing here at such a late hour? Are you writing your composition? — No, I have already written it. I am working at my report. — And when did you write your composition? — I finished it two days ago. (Первый вопрос в Present Continuous, так как действие происходит сейчас. Второй вопрос в Present Continuous, так как спрашиваем о действии в данный момент. Ответ в Present Perfect, так как действие завершено. Продолжительное действие в Present Continuous. Последний вопрос и ответ в Past Simple, так как указано конкретное время в прошлом.)