Walaikum Assalam dear,
First of all, we all welcome you on this platform of CSS Forums and pray to Almighty ALLAH that may HE, with HIS Unlimited Blessings and our prayers, makes you successful in the up-coming year in CSS exam.
Second, I also suggest you to work hard on your English Language and writing skills through 'Wren & Martin'.
And in last, I welcome you again wholeheartedly to ask anything on anytime regarding CSS preparations because it will be a great pleasure for me to lead you regarding it.