Здравствуйте помогите срочно задание 4 заранее спасибо

1.I am a student.2.My father is not a teacher,he is a scientist. 3.Is your aunt a doctor?-Yes she is. 4.Are they at home?--No they are not at home,they are at work. 5. My brother is a worker.He is at work. 6Are you an engineer?--Yes, L am. 7.Are your brother at school?--Yes,he is. 8.Are this your watch?--Yes it is. 9.This is my bag