My uncle is a police officer.
—No, he (isn't/aren't).
He (works/working) in a (postman/post office).
She (sing/sings) very well.
She is a (sings/singer).
She is a (teach/teacher).
A. She is a cleaner.
B. No, I don't.
C. My father.
D. No, she can't.
E. Yes, he'll be here.