I’m sorry if this is a technical question, but I can’t see where else to ask it! The writing exercises are taxing but very rich in information, especially in the multiple alternative answers. It’s quite frustrating that if you don’t note these down at the time (or scroll back through the exercise right away) there isn’t a way of retrieving them without repeating the whole exercise. Maybe that is intended? The links to the grammar points are well covered but do not actually include the quite wide range of vocabulary and idiomatic expressions, ie the different ways of translating the same thing.