His brother is a student.(对a student提问)

问题描述:

His brother is a student.
(对a student提问)

What's his brother?
这里问student,实际上问的是职业,应该用what提问
另外,只有第一人称和第二人称提问时才互相转换,这里第三人称没必要转

what's your brother?

What does his brother do?

what's his brother?