So, I'm to translate a sentence to English. It's something like:
We've succeeded in coming to an understanding ______ all questions discussed.
I suppose that I should use either about or in to fill the blank in the sentence above. Here is a paraphrased sentence so that you're able to understand the meaning better:
We've discussed several questions and we've come to the same opinion on every one of them.
(Aside: I wonder if I used the correct preposition in the sentence above.)