1. 选择合适的句子，补全对话

A. Is she a doctor（医生）? B. Who's that woman? C. Goodbye. D. No, she isn't.

A:

B: She's my mother.

A: Is she a teacher?

B:

A:

B: Yes, she is.

A: Oh, it's time to go home.

B:

A: Bye.