——_______.Where is the post office?
——________, I don't know.
A.Hi; Thank you B.Excuse me; OK C.Excuse me; Sorry
（）你要问路，就要先对对方说：__________
A. Excuse me. B. Can I help you ？
（）Mike: Good afternoon, Mrs. White!
Mrs. White:
| A．This is Mrs. White | B．Nice to meet you, Mike. |
| C．Good morning, Mike. | D．Good afternoon, Mike. |
（）Sarah: Good morning, Mr. Black!
Mr. Black:
| A．Hello, Sarah | B．Good morning, Sarah. |
| C．I’m Mr. Black | D．Good afternoon, Sarah. |
（）Mrs White: Hello, Mike.
Mike:
| A．Hello, Mrs White. | B．Nice to meet you, too |
| C．See you. | D．This is Chen jie. |
（）Sarah: Bye, Wu Yifan.
Wu Yifan:
| A．Good bye, Sarah | B．See you, Sarah. |
| C．My name is Wu Yifan. | D．Nice to meet you, too. |