The paragraph is followed by an incomplete phrase or sentence which summarizes the main idea of the paragraph. Choose the missing words of the phrase or sentence.

Besides the academic degree, teachers should also be interested in teaching. It was necessary not only that teachers should be knowledgeable in their major fields, but also that they should be skillful. In addition, the teacher must have proficiency in the target lan- guage that includes four skills: understanding, speaking, reading, and writing.
It is really （） to be a teacher.