It's my ... — 英语情景题
题目
情景对话：开学第一天，Sam 和 Lily 在整理文具。
Sam: Hi, Lily! Is this your pen?
Lily: (1)________, it is. It's my pen.
Sam: Look! What's this?
Lily: It's a ruler.
Sam: Is it your ruler?
Lily: No, it isn't. It's not my ruler.
Sam: (2)________ my ruler. Thank you, Lily!
Lily: You're welcome!
(1) 处应填：肯定回答的礼貌用语（一个单词）
(2) 处应填：It's