.--- Is your sister a factory worker or a doctor?
--- .
A. Yes, she is
B. No, she isn’t
C. A factory worker
D. Yes, she is a doctor
网友回答
A. Yes, she is
B. No, she isn’t
(答案→)C. A factory worker
D. Yes, she is a doctor
解析：根据or可知，本句是一个选择疑问句，不能用yes或no回答，故应将ABD排除。所以本题选C。