@Murkrow But it's not, I think, an issue of "they should not give the corresponding English idiom", it's just that they're using the same "practice as teaching" system as the rest of the class... while forgetting that it cannot work here, since there is no word database for the bonus sections and you won't get to understand the words from other contexts. ^^°
These two things, idioms & flirting, have been clearly done too fast, and because of demand, outside of the global class thing. They have lots of inaccuracies & outright errors in them, much much more than the regular lessons. They're really not meant to be taken seriously, i think. :x