Sbr

Hello.. I am not able to remember all the criteria of the difference standards in sbr ... Nor am able to identify them in the revision qn... I have finished reading all topics n I feel I have forgotten when am doing the Qn plus I have also watch ur lecture video... Am not able to answer the question given in the kit by my own .... Can u plz give me some tips how should I prepare as I just have less than a month for June exam.... This is scaring me now...as days are going..plzzzz help ...