题目:
Don't use words, expressions, or phrases ______ only to people with specific knowledge. [ ]
A. being known
B. having been known
C. to be known
D. known
答案:
答案:D
Don't use words, expressions, or phrases ______ only to people with specific knowledge. [ ]
A. being known
B. having been known
C. to be known
D. known
答案:D