1. -Is she a teacher -Yes, she is.
2. You are not children.You are students.
3.Are they in class now -No, they arent.
4.-Who are you -I am a student.
5. She is my friend.
6. He is not a doctor.
7.These are my children.(They are my children- так желательнее)
8.What is it -It is a new book.
9.Where was he last week
10.We are friends.