Has fully operational command of the language; With only occasional unsystematic inaccuracies. Misunderstandings may occur in unfamiliar situations. Handles complex detailed argumentation well.

• 非常良好使用者，能将英语运用自如，只是偶尔会有错误，在不熟悉的状况下可能出现误解，可进行复杂的详细的争论辩论