We know you will help us（）a prompt response to this problem.

We know you will help us（）a prompt response to this problem.

正确答案：with

解析:本题考查介词 with 的用法。全句意思是：我们知道贵方对这个问题会给予及时回应。

★《布宫号》提醒您：民俗信仰仅供参考，请勿过度迷信！