ls that her beautiful dress?yes,itis改为复数形式

ls that her beautiful dress?yes,itis改为复数形式 What is that?itis a pen改为复数形式 that is my dress.改为复数形式 ls he your brother?改为复数形式 Ls she your cousin改为复数形式 ls that your key ?(改为复数) that is her parent.(改为复数形式） sarah:ls her birthday in january?jim:( ),itis.sarah:()the()? ls that your skirt?用复数形式提问.ps: Ls this an orange ? Yes,is is . Are（ ） （ )? yes,( ) ( ) 改为复数 Is that your brothers?""Yes,itis" itis a watch 写成复数形式