The professor couldn't have done what he ______; he is not that kind of person.A.accused B.is accused C.accused of D.is being accused of

D,固定短语 accuse sb. of doing sth. 控告某人做某事

选D
The professor couldn't have done what he ______; he is not that kind of person.
教授不可能做出现在被人起诉的这种事，他不是这种人。
What在句名引导宾语从句，"what he is being accused of" 从句做done的宾语。

D
accuse sb.of doing sth.控告某人做某事,固定搭配
这里是教授被控告,所以是被动
综上所述,用 what he is being accused of

D
教授不会做出现在被起诉的事情，他不是那种人。