Btw.: It's "De->m<- Mann, der das Fenster geöffnet hat, war kalt". I guess you wanted to express that the man who opened the window was freezing. "Der" is only correct if you want to express that his temperature was low. One of those traps I guess.
Thanks for the tip. I didn't know there was actually a distinction for that in German; in English, you're either cold, or you're cold. You could also freeze if you're cold, but that's a little extreme.
You could also freeze if you're cold, but that's a little extreme.
