Does anybody know about a study guide i can use for the NC DMV written test?

I'm looking for something that will help me with the written part of the DMV test. I got the book and read through it but i don't want to keep going through it because even though it has all the answer in it, you don't exactly what to study. I'm just looking to study what actually on the test. So if you know any website that offer a study guide or anything please help me out.|||Make SURE to study the road signs, they are tricky.