A

⑴Good afternoon, Ms. Wei.

⑵What's your name? 

⑶How are you, Ms. Smart?

⑷Goodbye, Daming.  

⑸Sit down, please. 

B

A. I'm fine, thank you.

B. I'm Linging.

C. Good afternoon, Lingling.

D. Bye-bye, Sam.

E. Thank you.