Задать 5 вопросов общий,разделительный,альтернативный,к подлежащему и специальный
предложение:Pupils are reading a book at school now

Are pupils reading a book at school now  - общий
Pupils are reading a book at school now,aren`t they - разделительный
Pupils are reading a book or witer a textbook at school now - альтернативный
Who are reading a book at school now - к подлежащему
Специальный не знаю.
 

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?