studying a whole day

I am very anxious about the two exams in raw. When I realize the final may four exams in a very close time, I think the mid-term is OK now. I still have around ten days. If I study like today, it is possible finish all the study.
Sometime I wonder why I study so hard, but I can have only one reason. I don't have other veluable things need to do, so letme pretend to desire "A"s. Essentially, "A"s have no any meaning at all for me. Life is so empty. I am not sure what I am waiting for.