How/ ungrateful/ you/ not/ greet/ former/ teacher/ meet/ him. A. How ungrateful of you not to greet your former teacher when you met him. B. How ungrateful you are not to greet your former

How ungrateful of you not to greet your former teacher when you met him.

How ungrateful you are not to greet your former teacher when you met him.

How ungrateful to you not to greet your former teacher when you met him.

How ungrateful of you not to greet your former teacher to met him.