He is a doctor,but his wife is an engineer,__ __?改为反义疑问句改反义疑问句,说明原因

问题描述:

He is a doctor,but his wife is an engineer,__ __?
改为反义疑问句
改反义疑问句,说明原因

答案:isn't she
问题补充那个问题不完整,不知道怎么选.