Вставить диеслово to be в present simple:
13. I ... a pupil, I ... not a student.
14. ... this your book? — This book ... not my. My book ...
in my bag.
15.Michael has a brother. His brother ... 20. He ... a stu­ dent. He ... at home now.
16.These ... his newspapers.
17. ... there any books on your table? — Yes, there ... .
18. I ... a doctor. I ... a good doctor.
19. ... his friends ... at school now? — No, they ... in the garden.
20. ... her sister a teacher? — Yes, she ... .