Whose are these books 对么?和 whose boos are these 是否一个意思

whose is this book Whose are these books 为什么这句对whose is this book 而这句Whose are these books 就不对呢? Whose keys are these? whose sunglass are these? ——Whose book are these?——They`re( our )books 为什么是our? whose are these pencils?和whose pencils are these? whose pens are these?还是whose are these pen?区别? whose are these dirty shoes? whose ______ (photo) are these whose are these 怎么回答 whose+checks+are+these是什么意思 These are their -(book) Who bag is that?Whose is that girl?This book is mine book.These clothes are her. 单项选择：Whose book are these?They are （ ）.A.him B.her C.Mr.Green D.Mr.Green's Whose book are these They are him her Mr.Green's老师说的是 Mr.Green's 为什么?快 急 Whoes _____(book) are these Whose are these clothes?改为同义句.（ ) ( )are these? whose are these clothes 同义句_________ ___________ are these. Whose shoes are these怎么回答