—Good morning, boys and girls. I'm Ms Smart. (   )
—_____________

A．I'm fine, thank you.

B．Good afternoon.

C．Good morning, Ms Smart.

在下午碰到老师，我们应该说：(  )

A．Good afternoon, teacher.

B．Good morning, teacher.

C．How do you do.

--- Good morning, Mr. Li!  (   )
---_______

A．Sit down, please.

B．Hello.

C．Good morning, Jim.

当你和朋友打招呼时，你应该说：______( )

A．Hello .

B．Goodbye .

完成下列对话
1. A: How are you?
B: _________.
2. A: How many pears do you have?
B: _________
3. A: Good evening, Dad. Nice to see you!
B: _________, too.
4. A: Good morning, boys and girls!
B: ________________.
5. A: _____________?
B: Fine, and you?
6. A: ________________? 
B: I have ten rulers.