Don't use words, expressions, or phrases
题型:选择题
问题:
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
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