阅读对话,选择正确的答案。
John: Look, Mike! This is my new classroom.
Mike: It's so big! And it's nice, too. There are many desks and chairs in it.
John: This is the teacher's the teacher's desk. Look! The computer is on the teacher's desk
Mike: What's that near the door.
John: My picture. How many lights do you see?
Mike: I see eight lights. And I see six fans.
John: Oh, the blackboard is too dirty(脏的)
Mike: Let me clean it.
John: OK.