It's amazing how much this______A.helpedB.help怎么翻译啊,选什么?请指导,

It's amazing how much this______A.helpedB.help怎么翻译啊,选什么?请指导,
It's amazing how much this______
A.helped
B.help
怎么翻译啊,选什么?请指导,

It's amazing how much this______A.helpedB.help怎么翻译啊,选什么?请指导,
我觉得是选A,helped.
既然事情都让人已经觉得很amazing,说明这件事情是已经发生了的.故选过去式,helped.

A
(这点/这件事)带来的巨大帮助真是让人吃惊.
如果选B应该是helps(第三人称单数)

A
因为B的时态不对，要是一般现在时的话B应该是helps.