Where does he meet three other boys from his group ? ( Специальный)
Whom does he meet at the railway station?
(Вопросов к подлежащему)
Does he meet three other boys from his group at the railway station ? (Общий)
At the railway station he meets three other boys from his group , doesn't he?( разделительный)
Does he meet three or five other boys from his group at the railway station ? ( альтернативный )