阅读下面这段对话,完成任务。 Miss Huang: Morning, class. Pupils: Morning, Miss Huang. Miss Huang: OK. Bob, what's this? Bob: It's a dog. (A) Miss Huang: Good. What's this room, Grace? Grace: I don't know (我 不知道). Alice: I know. (B) Miss Huang: Good .(C) Alice: A sun. Miss Huang: Is this a classroom? Alice: Yes, it is.(D) Miss Huang: What is it, Dale? Dale: It's a music room. 1. Morning 是_________更为口语化的表达形式。 2.句子 It's a lab.应还原到对话中的_________处。 3. 句子What's this?应还原到对话中的_________处。 4. _________ is a teacher (老师)。 5. Dale is a_________.