That's my sister skirt.怎么把这个句子改对啊?

That balloon is my sister’s.(划线部分：my sister’s) 是whose balloon is that? 对划线部分提问 That's my sister.(划线部分my sister)__is____? That's my sister(改为复数形式） That's my sister.(改为复数句） -Do you k( ) that girl? -Yes,she's my sister. that is my sister s dress 用whose提问 S __is my sister my sister's name That is my room and that is my sister's room有什么错 This's my brother and that's my sister.错在哪? This‘s my brother and that's my sister.错在哪在线一分钟等 This's my brother and that's my sister.错在哪 That ismy family.That's my fater .she?my mother.Who's she?She's sister.And who they? This is my room,that is my sister's room 哪里错了 My mother's s.is my sister. that blouse is my sister's 否定句 疑问句that blouse is my sister's 改为否定句和疑问句疑问：否定： That my family.That's my fater .she?my mother.Who's she?She's sister.And who they?They're my grandparents.空格处分别填什么? Who's that girl ___ my sister A This is B She is C It's D That's