请先写出对话中的错误,并改正过来.

请先写出对话中的错误,并改正过来.
A：How many people is there in your family?1.( )
B：Five.
A：Where are they?2.( )
B：They're my grandfather,grandmother,father,mather and me.3.( )
A：What do they do?
B：My grandfather is a work.4.( )
My grandmother is a English teacher.5.( )
My father and my mother are all doctors.