Сделайте предложения вопросительными. We were having lunch in the canteen. She was singing a lovely song. You were speaking to your boss. George was sitting in the armchair by the fireplace. Jane and Margaret were going to the airport.
Were we having lunch in the canteen? Was she singing a lovely song? Were you speaking to your boss? Was George sitting in the armchair by the fireplace? Were Jane and Margaret going to the airport?