When a person is supposed to write in a paper, no matters it is CSS or any other one, he must keep in mind that whatever he is going to write, must be comprehensive. The more one writes,the more chances of mistakes are there but sometimes, but sometimes, the less he writes, the less marks he attains.

Expansion of ideas is a very good thing as it enables the checkers to know about your knowledge but hence, some teachers like to read quality piece of writings not quantity. Observe your teacher that what actually he is expecting from you. If your fail to, just ask from him/her.

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~Time owns each and everything~
~Useless youth if not useful for Pakistan~