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.