French phrase
Quels ~ sont gratuits ?
Meaning
Which ___ are free?
When to use it
Asks which things have no admission charge. Common when asking about tourist attractions or facilities.
Example dialogue
Quels sites touristiques sont gratuits ?
Which tourist attractions are free?
La cathédrale et le parc sont gratuits, mais le château est payant.
The cathedral and the park are free, but the castle charges admission.