@josemanuel It's what you pay them for...
Oh wait I was joking but,,,
Well anyway find a better study partner perhaps 0r try a random like me once in a while... I charge you only the responsibility of your own life while re-learning it (they rest you're innocent of !)
Plan a day / time - and get soft questions...
... save some $ (maybe)
+ find some $£nce (100%)