（）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. |
（）你向你的妈妈介绍你的同学Sarah时，你说：
A . Hello, Sarah.
B. Hello, I’m Sarah.
C . This is Sarah.