Standing nights studing

From the day before yesterday, I have studied in Central library. Because there are some mid-term tests next week, I have studied standing all night along for last few days. Somebody might ask that 'Why did you have to stand all nights? Can't you study plenty of time at the daytime?' Well, that's quite right. But on the weekends, I got to work in the billiards club the hole day long and I won't have much time to study. And also, I have mento jobs in Kong-ju middle school on Friday, Saturday and Sunday. I actually don't have much time. It's really a hard time standing all the nights studing but I can take the hard time. I hope the mid-term tests will be over soon so that I can take some rests.