4.As a public relations officer,he is said ________ some very influential people.A.to know B.to have been knowing C.to be knowing D.to have known

4.As a public relations officer,he is said ________ some very influential people.A.to know B.to have been knowing C.to be knowing D.to have known
4.As a public relations officer,he is said ________ some very influential people.
A.to know
B.to have been knowing
C.to be knowing
D.to have known

4.As a public relations officer,he is said ________ some very influential people.A.to know B.to have been knowing C.to be knowing D.to have known
我觉得应该是D
因为这里的is said 是据说的意思,据说他认识一些很有影响力的人物.
A表示的是将认识（因为to do 有逻辑将要的意思）
B表示认识这个动作迄今为止已经持续了一段时间,一般情况下要和表示一段时间的时间状语连用.
C表示认识这个动作是正在进行的（因为to be doing 有进行的意思）
D 表示的认识这个动作已经发生了.