( )his telephone number, the manager had some difficulty getting in touch with the clerk.

来源：百度知道 编辑：UC知道 时间：2024/09/28 07:11:20
( )his telephone number, the manager had some difficulty getting in touch with the clerk.

a.Not knowing
b.Knowing not
c.Not having known
d.Having not known

这道题选哪个,选它的原因是什么,谢谢~

A. 表原因，没必要用完成式
bd形式不对。

a

A. Not knowing

答案是A 这里是动名词短语做状语，不是状语从句，不需要考虑太多的。

我觉得，A就可以了，没有必要用完成时。