This is my sister.________name is Mary.空处填什么?

（this）is my sister My sister is a singer.__ your sister ___? I have new photos of my family.And they're very nice.This is my sister.Where is she?Is __ at the library?__填什么？ This is my sister.改为复数形式、 This is my sister(变为复数句) This is my sister.(改为一般疑问句) oh,jane,this,is,my,sister,kate. 是this is my sister kate吗 this is not my sister 缩写 This is for my sister是什么意思 This girl is my sister 对划线部分提问：（my sister)对（my sister)提问 This is my own bag.=This is a __ __ __ __ This is my sister a什么that is my brother? And this is my sister和This is my sister的区别, This is my sister.________name is Mary.空处填什么? 什么时候用she is my sister ?什么时候用this is my sister?急!急! 什么时候用this is my sister,什么时候用she is my sister? My sister goes to shool on foot.My sister goes to school on foot __ __ __ __.My sister goes to shool on foot.My sister goes to school on foot __ __ __ __.May I play football this after noon?(作否定回答）__,you __.