Whose...? 询问归属 — 英语填空题
题目
同学们在整理玩具角。A: ___ bag is this? B: It's Yang Ling's. It's ___ (她的) bag. And look at that robot. It's Mike's. It's ___ (他的) robot. A: I see. And this is my doll, so it's ___ (我的) doll. 请按顺序填空（每空一词）：第一空填疑问词，后三空填括号中文对应的单词。