Поставить 5 вопросов к этому предложению.I had read a book by 2 o"clock (before you came)

Question

Поставить 5 вопросов к этому предложению.
I had read a book by 2 o"clock (before you came)

Answer 1

1. who had read a book by 2 o'clock?. 2. I had read a book hadn't I ? 3. had I read book or article? 4. When I had read a book?