Ответ:

1. I am a pupil.
2. My father is not a teacher, he is a manager.
3. Is your aunt a doctor? - Yes, she is a doctor.
4. Where are they? - They are at work.
5. My brother is a manager. He is at work.
6. Are you a waitress? - No, I'm not a waitress. I'm a manager.
7. Is your sister a teacher? - No, she isn't a teacher. She is a student.
8. Is your brother at school? - Yes, he is at school.
9. Is your sister at work? - No, she isn't at work.
10. Is this your cassette? - Yes, it is my cassette.
11. This is my bag. - Is it black or brown? - It's brown.
12. What are these? These are black bags.
13. Who is she? - She is my sister.
14. Where are you? - I'm in Riga.

Объяснение:

Обычно на общие вопросы на английском языке отвечают коротко.

Например:

Is your aunt a doctor? - Yes, she is.

Are you a waitress? - No, I am not. I am a manager.

Is your sister a teacher? - No, she isn't. She is a student.

Is your sister at work? - No, she isn't.

Is this your cassette? - Yes, it is. (или Yes, it's mine - Да, это мой)