How to say in Czech: Which search engine do they use?

English
Which search engine do use?
Czech
Který vyhledávač používají?
Search as we would, we could not find it.
Which ticket should they buy?
They live there.
Did they like it?
Do they like her eyes?
Do they like it?
Do they live here?
Do they understand her?
They do not care.
Which do they prefer, dogs or cats?

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