live in/at/on/住在（zhù zài）….
eg.
A：你住在哪儿？/where do you live?
B：我住在北京。/I live in Beijing.
A：你在北京哪儿？/where do you live in Beijing?
B：我住在光明路15号。/I live at No. 15, Guangming Road.
A：你住在几楼？/which floor do you live on?
B：我住在8层。/I live on the 8th floor
sentence structure:
subject+住在+（order：Country，City，District，Street，Street No，Apartment/House Name，Building No，Room No, Floor ）