选择正确的句子补全对话。 A. We have a new classroom. B. Where's my seat? C. Good afternoon. D. Let's go and have a look. E. This is John, our new classmate. Mike: Good afternoon, Chen Jie. Chen: 1____________, Mike. Mike: Chen Jie. 2____________ Chen: Nice to meet you. John: Nice to meet you, too. Chen: Mike. 3____________ Mike: Really? 4____________ John: Wow! It's so big! 5____________ Mike: It's near the window.