those are her books 改成单数

those are her books 改成单数 What are those?改成单数 Those are her books her画线 提问 are those our english books?改单数 Those are books 改为单数句子 Those books are ours.(改为单数） those are Chinese books.改成复数句 Those are old libraries.改成单数句 Those are my books 改成 _____ are those? Are those her books?(做否定回答) Those are her photos改为单数形式~ Are those her erasers改为单数句