"seiet", "habet", seriously?! major errors clear even to a beginner
clearly they used some algorithm to generate the quiz without considering even the most used exceptions and irregularities. what is even worst... presenting "seiet" as right when the right form is not even in the possible answers... presenting "habet" alongside the right answer "habt" and considering an error when the right answer is given... sein and haben are used as "building blocks" for many other verbs, having errors on these is like mining the foundations...
