I won't believe it until I__it with my own eyes.A saw B have seen C had seen D will see 选哪个?为什么呢?

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I won't believe it until I__it with my own eyes.A saw B have seen C had seen D will see 选哪个?为什么呢?
I won't believe it until I__it with my own eyes.
A saw B have seen C had seen D will see 选哪个?为什么呢?

I won't believe it until I__it with my own eyes.A saw B have seen C had seen D will see 选哪个?为什么呢?
b
前面是won't,所以必须用现在完成时.