kia su, kia si, kia lang

my form 1 final exam was 2 nov.before that l was busy studying.l was in 1 biru the second last class.there are 6 classes altogether.l'm in 5th class.a lot my my classmates were playing a full althougt exam commingl and my bestfriend were busy studying. can say that only me and my bestfriend were studying.the rest was playing.one of my friend were saying that''wah,so hardworking ha''.l was thinking that not l the person hardworking.but they the person lazy. then the next day l went to school, my sis absent,so l decided to go to library to study.when l was study in class,one of my friend said'' ong so hardworking for kam pou ya''.believe me thats my class.l hate my class.my class is always more noisy then last class.then l told my bestfriend that after school.l'm going to library.the same friend came ask me''ong go library ha''.then l said ''ahh''then the time l was reading so l didn't listen what my friend said.the my friend said''study ha''.then l said ''ahh''.then she said''kia su ha''.then l said''ahh'.then she ask again''kia si ha''.l said ''ahh''.the last one is she ask is ''kia lang ha''.l said''ahh''.she said''yoo, ong yeok kei kia si kia su kia lang yee''.l was ''what l kia su kia si kia lang?''that my classmates