"Did you turn the fridge on?"
On the learners' side, you are only shown three hints. On our side, there can be more of them. And we have "włączyłeś" in the system.
But there are four equally correct answers (or even nine if we consider the formal forms), so the system chose three of them and apparently didn't show "włączyłeś" (to one man). But "włączyłaś" (to one woman), "włączyłyście" (to a group of women) and "włączyliście" (to a group of men or a mixed group) are equally probable without further context.
The hints that you also saw are hints for just "turn" (or "you turn" in one case, that's why it repeated), not for "turn on".
"zamieniacie" (you had a small typo there) is plural "you turn" as in "You turn water into wine!", "zamieniasz" is the same in singular 'you'; and "skręć" is the singular 'you' imperative as in "turn left".