Were we in Samarkand with our friends last year? Общий
Were we in Samarkand with our friends last year or last month? Альтернативный
We were in Samarkand with our friends last year,weren't we? Разделительный
Who was in Samarkand with friends last year? Вопрос к подлежащему
Where were we with our friends last year? Специальный