Put the verb «to be» in Present Simple:
I a pupil. I at school.
My brother a painter. He not an engineer.
My sister at home.
We not at school. We at home.
My sister at work. She a doctor.
Mike a student.
you a student? – No, I a doctor.
your sister a teacher? – No, she a student.
Nick and Peter little children. They not at school, they in the kindergarten
1. am
2.am
3.is
4.is
5.is
6.are
7.are
8.is
9.is
10.is
11.are
12.am
13.is
14.is
15.are
16.are
17.are