English Precis CSS video lecture with tips and tricks and detailed discussion on all topics. Prepare CSS online through video courses.
Grammar is expected to be the most difficult paper of CSS, targetted every now and then. The main reason is that people believe Grammar is easy and do not practice it much.
The worst part is that one needs 40 marks to pass this subject and one is failed at 38 or 39. Such a close margin hurts even more. Grammar is more like Mathematics. If rules are known, one can give a 100% to the subject in the paper as well and score 70+ (i had scored 72 just because I had all the rules on finger-tips)