Ответ:

1. Are they singers? No,they aren’t. They are doctors

2. Are they acrobats? No, they aren’t

They are singers

3. Is he fireman? Yes, he is

4. Is she teacher. They are teachers

5. It is a tree. They are trees

6. I am a child. They are children

7. He is a man. They are men

8. It is a foot. They are feets

Объяснение:

13 No,they aren't.They are doctors.

14 No,they aren't.They are singers.

15 No,he isn't.He is a policeman.

16 They are teachers

17 They are trees.

18 We are children.

19 They are men.

20 They are feet.