My sister isn't___maths

Beth isn't my sister.------mycousin My sister isn`t good at maths Gina isn' t my sister. She's 改同义句my sister is shorter than my brother.改为my sister isn't__ The pencil isn’t m___,it's my sister My sister isn't afraid to speak in p___ My aunt has a sister.She isn't my aunt.Who is she?A.my mothe lt isn’t my sister,nor my brother,but still is the child of It isn't my sister or my brother,but still is the child of m The person isn't my sister,nor my brother,but still child (b My mother isn't at home ,so I am b my little sister. My English isn't very ____.But my sister can speak English v