Is this your eraser?(同义句转换） Whose is this bag?(改为复数句）

Is this eraser yours?Whose are these bags?Whose shoes are these?此外,shoes做主语时,若前面没有数量词的修饰,谓语动词需用复数形式,若前面有数量词,数量词的数目是一时,我们一般都用 this /a pair of shoes,谓语...