I ... a engineer My father ... not a doctor ... your aunnt a nurse?- Yes, she .. ... they at home?- No, they ... not, they ... at work My brother ... a pupil ... your sister a waitress? No, she not This ... my bag She is an actress My uncle ... an office-worker Ann ... a painter The shelf ... brown It ... on the wall He ... a student His family ... not in St.Petersburg, it ... in New York

Правильно вставить формы глагола to be так:

I am an engineer.
Я инженер.

My father is not a doctor.
Мой отец не врач.

Is your aunt a nurse? — Yes, she is.
Твоя тётя медсестра? — Да.

Are they at home? — No, they are not, they are at work.
Они дома? — Нет, они не дома, они на работе.

My brother is a pupil.
Мой брат ученик.

Is your sister a waitress? — No, she is not.
Твоя сестра официантка? — Нет.

This is my bag.
Это моя сумка.

She is an actress.
Она актриса.

My uncle is an office-worker.
Мой дядя офисный работник.

Ann is a painter.
Анна художница.

The shelf is brown.
Полка коричневая.

It is on the wall.
Она на стене.

He is a student.
Он студент.

His family is not in St. Petersburg, it is in New York.
Его семья не в Санкт-Петербурге, она в Нью-Йорке.

Итоговый вариант без перевода:

I am an engineer.
My father is not a doctor.
Is your aunt a nurse? — Yes, she is.
Are they at home? — No, they are not, they are at work.
My brother is a pupil.
Is your sister a waitress? — No, she is not.
This is my bag.
She is an actress.
My uncle is an office-worker.
Ann is a painter.
The shelf is brown.
It is on the wall.
He is a student.
His family is not in St. Petersburg, it is in New York.