что надобно вставить Emma works in a hospital. ______ is a

Что надобно воткнуть Emma works in a hospital. ______ is a doctor.
They
He
SheTom and Nick _______ my friends.
aren't
isn't
haven't
She's got ____ eraser on her desk.
an
a
---
The children _____ at school.
is
are
am
We ______ at our new school.
're
'm
's
I write with a ______.
pen
pens
pencil sharpener