—Your mother isn’t a doctor is she?--. She teaches English in a middle school.A. Yes

问题补充：

—Your mother isn’t a doctor, is she?

----. She teaches English in a middle school.

A. Yes, she is

B. Yes, she isn’t

C. No, she isn’t

D. No, she is

答案：

A. Yes, she is

B. Yes, she isn’t

(答案→)C. No, she isn’t

D. No, she is

解析：考查反意问句的回答：原则是，前后一致，如果是前面否定后面肯定的反意问句，就按照实际情况回答。句意是：--你妈妈不是医生，是吗？从后面的回答：她在中学教书，说明不是医生，选C。