AP Biology practice exams?!

<p>I have had an A in my AP Bio class all year. it dipped down to a B+ for about a month and it went back up. I pretty much understand all the material with the exception of some things that i just forgot and now need to go refresh my memory with. However, in our class when we were taking ap practice exams... i couldnt understand what a lot of the questions were asking. </p>

<p>I barely got a 3 (and thats with the assumption that i did an essay) --which i didnt. </p>

<p>is this common? i dont know why i'm messing up... am i just over thinking or stressing too much?
i have friends that have a C in the class and they are getting 4s...
also, i DO NOT cheat on tests so i am just confused at what happened...</p>

<p>any advice on major things to study? my ap test is in 2 weeks. i've been reviewing a lot of material and i have flashcards that i'm going over more and more. i just guess i need to analyze the graphs better.</p>

<p>any advice? please!!! and thank you!</p>