The exhibition of books on science was opened at the town library on January 18,wasn’t it? Разделительный
What was opened at the town library on January 18? Вопрос к подлежащему
Was the exhibition of books on science opened at the town library on January 18? Общий
Was the exhibition of books on science opened at the town library on January 18 or 19? Альтернативный
Where was the exhibition of books on science opened on January 18? Специальный