Непонятно одно. Предложени на англиском с словом an uncle

He has an uncle who lives in Paris.


My friend has got two uncles.


His uncle is travelling at the moment.


Mary and Jane are waiting for their uncle's arrival.


Her uncle invited her to spend her summer holidays with him.


Her uncle lives near this shop.


There are many books at her uncle's library.


My uncle reads a lot.


Tom's uncle likes to listen to classical music very much.


Jan's uncle is a famous artist.


Mary likes her uncle very much.


Jim has got five uncles.


Jim's uncle usually plays football with Jim.