What do our choices in this come down to?怎么句子?

What do our choices in this come down to?怎么句子?
What do our choices in this come down to?
归结而言,我们对此还有多少选择?
翻译是这样的,这什么句式?choices是名词,为什么?我觉得应该用动词啊,前面有个助动词do