N-level chinese and Social studies

Finally, N-level Chinese and Social Studies is finish within 2 days (Yesterday and Today)... BUT that stupid Social Studies come out the most simplest and popular question and that is Merger and Separation... And i did not go and memorise it... I onli remember bit of it.. That make so ANGRY.. SO SO SO simple but i did not memorise it.. If i listen to my friend friend hu guess Merger and Separation will come out, i will sure memorise it.. I going to throw my chinese and my Social Studies in to my cupboard and take it out next yr (if i can go to Sec 5)..