4. "Where do you put up?" is used to mean where are you staying temporarily, but it is more often used with an object: A: Where do you put up visiting relatives? B: We have a guest room.

What is put up with someone?

(put up with someone/something) to accept someone or something unpleasant in a patient way.

Where were you up to meaning?

The expression is What are you up to? It means What are you doing? What have you been doing lately? Just answer by telling your friend what you have been doing.