My brother is in Class 1 Grade 5.(改成一般疑问句)

问题描述:

My brother is in Class 1 Grade 5.(改成一般疑问句)
对划线部分提问(Class 1 Grade 5)

Is your brother in Class 1 Grade 5?
Which Class is your brother in?
楼上是错误的,不能用what!
望采纳,多谢!