A. Bob isn't here.
B. He isn't Raul.
C. She isn't Mary.
D. You aren't a student.
E. It isn't a dog.
F. They aren't good friends.
G. We aren't sad.
H. She isn't a secretary.
I. You aren't in the school.
J. It isn't open.
K. They aren't travelling for U.S.A.