Задание 7, нужно найти ошибку

1. What's your name? — My name is Ann.
2. What's your address? — My address is 45 Oxford Street.
3. Where are you from? — I'm from London.
4. Who is he (in this photograph?) — He is my father.
5. What is his name? — His name is John.
6. Where is he? — He is in London.
7. I am Lena and this is Nick. He is my brother. He is ten (years old) and I am twelve (years old). We are from St. Petersburg.
8. I am a pupil. I am at school.
9. My brother is a painter. He is not an engineer.
10. My sister is at work. She is a doctor.
11. He is a student.
12. Are you a student? — No, I am a doctor.
13. My sister is at home.
14. We are not at school. We are at home.
15. My brother is a pupil. He is at school.
16. Is your mother at home? — No, she is at work.
17. Is your cousin at home? — No, he is at school. He is a pupil.
18. Is your sister a teacher? — No, she is a student.
19. Is your father at work? — No, he is at home.
20. Is your sister a typist? — Yes, she is. — Is she at home? — No, she is at work.
21. My grandfather is a scientist.  
22. My mother is not a teacher. She is a doctor.  

1. What's your name? — My name is Ann. 
2. What's your address? — My address is 45 Oxford Street.
3. Where are you from? — I'm from London. 
4. Who is the man in this photograph? — He is my father.
5. What is his name? — His name is John. 
6. Where is he? — He is in London. 
7. I am Lena and this is Nick. He is my brother. He is ten (years old) and I am twelve (years old). We are from St Petersburg.
8. I am a pupil. I am at school. 
9. My brother is a painter. He is not an engineer. 
10. My sister is at work. She is a doctor. 
11. He is a student. 
12. Are you a student? — No, I am a doctor. 
13. My sister is at home. 
14. We are not at school. We are at home. 
15. My brother is a pupil. He is at school. 
16. Is your mother at home? - No, she is at work. 
17. Is your cousin at home? - No, he is at school. He is a pupil. 
18. Is your sister a teacher? - No, she is a student. 
19. Is your father at work? - No, he is at home. 
20. Is your sister a typist? - Yes, she is.
- Is she at home? - No, she is at work. 
21. My grandfather is a scientist.  
22. My mother is not a teacher. She is a doctor.