Resposta:
Explicação:
a. Mary isn't my best friend.
b. Jonh and Cindy aren't classmates.
c. Peter isn't my brother.
d. You aren't a good student.
e. They aren't in the classroom.
f. It isn't an orange.
g. Felícia and Mary aren't sisters.
h. I'm not her teacher.
i. It isn't a book.
j. You aren't a doctor.
