My brother is a doctor.[就画线部分提问】画线是My brother

网友回答

What is your brother's
======以下答案可供参考======
供参考答案1:
如果是my画线，Whose brother is a doctor?
如果是doctor画线，What is your brother's job.
供参考答案2:
What is your brother ?或What does your brother do？