she is my sister but i am not her sister ,i am her __

she is my sister. she is my sister but i am not her sister ,i am her __ (1/2)This is my twin sister,lucy.Not only she but also l ( My sister is good at ___(sing),but she isn't good at ___(dance) My sister eats a lot of ,but she is still very s She is my sister.对my sister提问 She is not my sister.改为肯定句【 】 【 】 my sister. this is my sister .really,but you look 【d.】.yes.she is very thin but i am a little heavy she is my sister改为一般疑问句 She is my sister改为同义句 She is my sister.改为否定句 __________________?Yes,she is my sister. she is my sister.改为否定句. My sister is a () singer.She sings() David,_____is susan.she is my sister She is a sister of my ____ (sister) 填什么 She is my sister and she is mother's d_____. my coat is old but my sister's is n-