Solution for the college entrance examination?

Asked by SKyLaR
i had taken an international exam GCE o level examination in Singapore and the exam is just like any other internation college entrance examination (SAT). But i think that my score won't be able to reach a junior college since i did not study much during the exam. Are there any solution to solve the problem? Like taking a placement test or online college entrance examination or any other exam, test, solutions to help me get to junior college? Please not ''bribe the examiner'' or ''retake one year'' solution.