문제 내용: 밑줄 친 부분에 들어갈 말로 적절한 것은?
  Obviously, no aspect of the language arts stands alone either
  in learning or in teaching. Listening, speaking, reading, writing,
  viewing, and visually representing are
선택지 1: distinct
선택지 2: distorted
선택지 3: interrelated
선택지 4: independent