Writing proficiency key for the teacher to check the answer. It comes with the students book package. It helps developing reading and writing skill for proficiency students. Virginia Evans is a great writer and teachers of teaching Writing and reading for students studying English at their proficiency level. Check this book and improving yourself. Skills improved at least for teachers and students also. hope it is useful to you. Writing proficiency key for the teacher to check the answer. It comes with the students book package. It helps developing reading and writing skill for proficiency students