Respostas
1. My sisters all have boyfriends.
2. The teacher has a yellow shirt.
3. My brother has a great job.
4. He has a dog.
5. They have a lot of money.
6. My cousin and his wife have three children.
7. Your friend has a sister.
8. Yes, my friend has a sister.
9. My neighbor has a mailbox.
10. They have time to play with us.
11. They have a car.
12. You have black eyes.
13. We have a ballon.
14. He has a beard.
15. She has pink hair.
16. It has green eyes.
17. You have a toy.
18. We have a wonderful school.
Explicação:
I = have
You = have
She = has
He = has
You = have
We = have
They = have
It = has
Na frase: My sisters ALL...( )
Se não tivesse o "all" seria has.
Então quando há alguma palavra entre o pronome (she, he, it, my cousin, my uncle etc) usamos o have quando não há usamos o has naturalmente.
Espero ter ajudado♡´･ᴗ･`♡