As you talk to him,.

题目

As you talk to him,.
___you talk to him,you will find that he is a simple but reliable person.
A.Until B.As C.Once D.Since.

答案

不是as,是once.
as“与.同时”,侧重动作同时发生,伴随进行.
once“当.的时候,在.时期”,相当于when.动作可能同时发生,也可以是有先有后.