Задать 5 вопросов общий,разделительный,другой,к подлежащему и

Are pupils reading a book at school now?
Pupils are reading a book at school now, aren't they?
Are pupils reading a book or writing a test now at school?
Who is reading now at school?
What are pupils doing now at school?

Are pupils reading a book at school now  - общий
Pupils are reading a book at school now,arent they - разделительный
Pupils are reading a book or witer a textbook at school now - другой
Who are reading a book at school now - к подлежащему
Особый не знаю.