wahhh!!! duno y i'm so tired and no mood today,during the maths lesson, i can't focus at all, listen to the teacher talking till my head almost drop on the table, i think now my interest of study all gone le, juz dun have tat time tat kind of feels, what should i do now, N lvl is very near le... can somebody help me? wake me up! if nt i will fail my N lvl... pls and thank you!