1. Budapest has got two different parts.
What city has got two different parts?
How many different parts has got Budapest?
What parts has got Budapest?
What Budapest has got?
2. There are good spa baths in the city.
What there are in the city?
Where are good spa baths?
What spa baths in the city there are?
What kind of spa there are in the city?
3. The public transport system is cheap in Budapest.
Were is the public transport system cheap?
What is cheap in Budapest?
What transport system is cheap in Budapest?
What the public transport system in Budapest is?
4. You can travel easily by tram and bus.
What you can do easily by tram and bus?
How you can travel by tram and bus?
By what you can travel easily?
Who can travel easily by tram and bus?