Complete the sentence with the correct form of the verb in brackets: "We ____ (stand) in the rain for an hour before the doors opened."

Explanation

The waiting ended when the doors opened, so the verb takes the past simple, and stand changes its vowel with no added ending to give stood. The same word follows have, as in we have stood here before, which is why this verb is one of the easier ones: one change learned, both past slots covered. The regular standed never appears in English.