Passive recognition of vocabulary, although a big step in the right direction, is far easier than the active use of the right word at the right time. So, in order to improve your level you need to work hard on widening your vocabulary.
Some exercises have been added to this site and otherwise will be incorporated once they work properly. These are samples of exercises used in blended learning courses but while they work properly during online classes and as standalones for some reason they don’t work properly here yet. Bear with us*, we’ll get there but for the time being here a couple of exercises to start with.
* be patient