Question

my friend was reading an interesting book at 4 p.m. yesterday.
Напишите пожалуйста общий вопрос, альтернативный, специальный,вопрос к подлежащему, разделительный вопрос

Answer 1

Who was reading an interesting book?

Answer 2

My friend was reading an interesting book at 4 p.m. yesterday. 
Was my friend reading an interesting book at 4 p.m. yesterday?
Was my friend reading an interesting book or writing a letter at 4 p.m. yesterday?
Who was reading an interesting book at 4 p.m. yesterday?
My friend was reading an interesting book at 4 p.m. yesterday, wasn't he?