Ответ:

1)Is he a doctor? Yes he is

2)Are you in the classroom? No we aren't

3)Are they friends? Yes they are

4) Is Lis at home? No she isn't

5)Are you singers? Yes we are

6)Is that Nick? No he isn't

7)Is Bob from London? No he isn't

8)Are you ten? Yes I am

9)Is it a cat?Yes it is

Объяснение:

To be:

I am

You are

They are

We are

He is

She is

It is