well, the questions pops up in everymind who just incline towards giving an attempt for CSS. Remember one thing, English essay is CSS counts more for the quality than quantity. But quantity shouldn't be undervalued. As this is a competitive exam ,one must put up all of his rational thoughts in best possible. Gou need to practice more n more. The easiest way is start practising paras of 100 words each. 2500 means 25 paras. So once you know the art of putting your thoughts in words, there you make your mark.