选择正确的答案补全对话，将序号填在横线上。

A. Is it cold? B. What time is it now? C. Goodbye, Mum. D. It is time to go to school. E. Look! It is on the chair.

Mike: Excuse me, Mum.

Mum: It's 7:00.

Mike:

Mum: Yes, it is. Hurry up!

Mike: OK. But where is my schoolbag?

Mum:

Mike: Oh! Thank you!

Mum: Bye, Mike.