Ответы к второму упражнению:
1) I am a student.
2) My father is not a shop-assistant, he is a scientist.
3) Is your aunt a nurse? Yes, she is.
4) Are they at home? No,they are not. They are at school.
5) Are you an engineer? Yes, I am.
6) Is your friend a photographer? No, she is not a photographer.
7) Are your brothers at school? Yes, they are.
8) Is this her watch? Yes, it is.
9) Max is an office-worker.
10) We are late, sorry!