Those books are for（）他们.他们用什么形式?为什么?

Those books are for（）他们.他们用什么形式?为什么? Those books are for 用所给单词的适当形式填空：Are those books mine (I)?为什么填mine Are those books yours?(改为单数形式） 用括号内单词的正确形式填空 Those books are my _________(classmate) New Ye Those are your books.改为单数形式要怎么改? How much are those books的另一种形式 （ ） are those books填特殊疑问词 Are those your books?（否定回答） Those books are ours.(改为单数） Those books are for______________. Are those books (your)