选择合适的句子补全对话，只写序号。

A. What time is it? B. What's the weather like in New York? C. This is Mike. D. How many students are there in your class? E. It's on the second floor.

A: Hi, John.

B: Hello, Mike.

C: It's sunny. How about Beijing?

B: It's sunny, too. Where is your classroom?

C:

B:

C: Forty-five.

B:

C: Oh. It's 12: 00. It's time for lunch. Goodbye.

B: Bye.