Microeconomics- help?

[quixadoxically]

So I've been studying for about 2 weeks, and am taking the Microeconomics CLEP in 3 days and I'm a little nervous now. I just signed up for Instantcert and was looking over their Basic Economic Concepts flashcards and I don't know a thing! I've taken several practice tests and read through 3 books- CLEP Principles of Microeconomics with REA software, Princeton Review AP prep for Microeconomics (yes I'm aware it's AP not CLEP but it came highly recommended for studying from other forums), and the Official 2012 CLEP study guide and I passed all those exams with 60+ scores. Now I come here and don't know a single question.

Is this site accurate in their questions being on CLEP tests or am I just missing something?

Thanks for your time answering.