1)
A ruler
An eraser
An atlas
A pen
A classroom
A textbook
2)
1 it
2 he
3 they
4 it
5 she
6 they
3)
He and I are 10 years old
It's on the desk
We are classmates
It’s in room B
4)
he's
she isn't
We're
I'm
They aren't
You're
5)
1 am
2 am
3 is
4 isn't
5 are
6 am
7 are
8 are
9 is
6)
Is it atlas? No, it isn't
Are they notepads? Yes they are
Is she teacher? Yes, she is.