阅读小对话，选择正确的答案。

Mike: Welcome to my home.

Sally: Who is this?

Mike: It's my mother.

Sally: She is friendly. Is she a nurse?

Mike: No, she is a teacher.

Sally: What's your father's job?

Mike: He is a great driver.

Sally: Is this your sister?

Mike: No, it's my aunt. She is a doctor.

Sally: Are there three people in your family?

Mike: No, four. And me.