1.The pen is my brother's.
问：Is the pen your brother's?
2.That is Liu's sister.
问：Is that Liu's sister.
3.Anna is Jim's sister.
问：Is Anna Jim's sister?
4.The pen is Miss Jin's.
问：Is this Miss Jin's pen?
5.My mother's handbag is yellow and white.
问：Is your mother's handbag yellow and white?
6.It is Helen's grandma's glass.
问：Is it Helen's grandma's glass?