____his telephone number ,she had some difficulty getting in touvh with Bll选项见下

题目

____his telephone number ,she had some difficulty getting in touvh with Bll选项见下
A.Having not known B.Not having known C.Knowing notD.Not knowing什么句型,语法有哪些点?

答案

选D
非谓语从句,因为非谓语动词和主语是主动关系,
且否定非谓语时,not放前面.