my sister is a

my sister is a She is a sister of my ____ (sister) 填什么 she is my daughter.A sister B sister's C my sister is a girl .my mother is a ____ My.sister.is.going.to.buy.a My sister is seeing a book改错 She is a friend ( )my sister's A girl over there is my sister My sister is a nurse 句子成分 This is my ( )dictionary.A.sister Mary My sister is a () singer.She sings() My sister is a waitress. 提问