Is this your...?一般疑问句 — 英语选择题

课间，Lily 在文具盒旁捡到一支蓝色钢笔。她先问 Mingming：'Is this your pen?' Mingming 回答：'No, it isn't. My pen is black. This pen is Amy's.' 根据 Mingming 的回答，Lily 想确认钢笔真正的主人，她最合适的完整说法是： A. Is this pen Amy's? It's Amy's pen. B. Is this your pen, Amy? C. It is Amy's pen. D. Is this your black pen, Mingming?