I ___ from Russia. (+)
am
I ___ a dog. (-)
am not
We ___ teachers. (+)
are
He ___ short. (-)
isn't
Tom ___ a girl. (-)
isn't
My mother ___ tall. (-)
isn't
My nose ___ long.
is
I ___ a good student. (+)
am
My parents ___ old. (-)
aren't
Molly ___ fat. (+)
is
You ___ my best friend. (+)
are