[单选题,7.6分] __________ how to operate a switchboard, I had to ask the office supervisor to show me the correct procedures. A.Not known B.Not to know C.Not knowing D.Having not known
[单选题,7.6分] __________ how to operate a switchboard, I had to ask the office supervisor to show me the correct procedures.
A、Not known
B、Not to know
C、Not knowing
D、Having not known
发布时间：2025-01-03 14:42:45
