i hate exam

i am thinking about a question why must we have exam.but i think i know the answer.my exam start at last last week.sia lor exam for 6 day but never revise my work,think i will retain this year which i which will never come true.do the samething in the 6 day .paper finish then go lan play until no money then go home.at home got scolding for my mom in the six day.on the last day,climb the gate in school with shawn and fu quan to go out cos the person who open the gate never open the gate.the gate got some barb wire then fu qun don care and just climd he got cut on the leg then i climb i also got a cut on the leg then shawn climd,he got no cut.then go lan to together after that we went home.pls don tell teacher,if you tell teacher,i will find out who is it cos people in the class who know who i am is very less.thank you