It more than likely never was, but there's just about nothing you can do about it now- unless of course you get working on memorizing Emanuels cover-to-cover. But let's be serious- you're likely in the same boat as say about 60% of your class. Of course there is that 40% who were paying attention, but they were going to get A's regardless of your input. Now you just have to wade your way through to a B+ (haha).
You know your odds are good when you're discussing finals with your professor and he tells you that getting 1/2 of his multiple choice is on the road to an A. Seeing as you are statistically likely to get 1/4 right by chance, you're already off to a good start.
I know you probably think you're doomed....
but remember... Some things never change.
