Is that your brothers?""Yes,itis"

Is that your brothers?""Yes,itis" It's this your pencil? -Yes,itis. It's that you book? -Yes,i Is this girl your sister.怎么回答. A Yes,itis. B Yes,she is. Is this your backpack?选择：1、Yes,this is2、No,itis not3、Yes,it Is this your father 怎样回答,到底是YES,ITIS还是YES,HE IS,其中原因是什么? WOw,your new hat is so nice A.thank B.yes,itis C.i don't thi Is that your estate Yes,it is Is that your brother?Yes,()is ls that her beautiful dress?yes,itis改为复数形式 Is that your shirt?yes,( )( )./No,( )( ). Are （）your brothers?Yes,they are.And（）is my sist is that your sister?is she your sister?yes,___ ___ yes,___ _