It's only fair to add that they were not told about the problem until the last minute.

要补充说明以下情况才合理，即他们是最后一刻才获知这个问题。

《牛津词典》

It's only fair to add that they were not told about the problem until the last minute.

要补充说明以下情况才合理，即他们是最后一刻才获知这个问题。

《牛津词典》