Wstaw właściwe wyrazy. AT ch 4/3
1	Are they your books?   Yes, they    is   are   isn't   aren't  .
2	Where    is   are   isn't   aren't  your grandparents from?
3	How old    is   are   isn't   aren't  your dad?
4	They    is   are   isn't   aren't  from Spain. They're from Italy.
5	This    is   are   isn't   aren't  my bag. It's Anna's.
6	These    is   are   isn't   aren't  my books. They're my sister's.