What is it? — 英语情景题

情景对话：Sam 和 Lily 在动物园玩猜动物游戏。请从方框中选择合适的句子补全对话，将序号填在横线上。 方框：A. It's a panda. B. Is this a tiger? C. What is it? Sam: Good morning, Lily. Lily: Good morning, Sam. Sam: Guess! (1)________ Lily: A cat? Sam: No, it isn't. Lily: (2)________ Sam: No, it isn't. Lily: Oh, I know! (3)________ Sam: Yes! It has two black eyes. It's so cute.