1. What do people often say? (специальный) Do people often say that St. Petersburg is the "Venice of the North"? (общий)
Who often says that St. Petersburg is the "Venice of the North"? (вопрос к подлежащему)
Do people often say that St. Petersburg or Moscow is the "Venice of the North"? (альтернативный)
2. When does anyhing wonderful happen in St. Petersburg? (спец.)
Does every summer from June to July anything wonderful happen in St. Petersburg? (общий)
Does every summer or winter anything wonderful happen to St. Petersburg? (альтернативный)
What happens to St. Petersburg every summer from June to July.(вопрос к подлежащему)
3. Do they watch the bridges open as boats pass by and fireworks fill the sky? (общий вопрос)
Who watches the bridges open as boats pass by and fireworks fill the sky? (вопрос к подл.)
What do they do as boats pass by and fireworks fill the sky? (спец.)
Do they watch the bridges open or go home as boats pass by and fireworks fill the sky? (альтернативный)
I love to be in my flat/house. My flat/house has own atmosphere and aura. :)