A reason is an only one things!!! It is easy for me to write one.
I wonder why I don't notice it by now

10: 00 ......I got up .
10:30......I went to OCU to attend a class of Knot theory.
12:00......After class, I ate lunch a restaurant near my house.I read a comic-magazine "Jamp"every Monday.
13:00 ......I had slept until about 17 o'clock. I regretted sleeping too much time.
17:30......I am TA of "liner algebra" now , so I checked test of one.
21:00......I finished checking it and I went to the library to borrow and to return books.
21:30......I ate supper "sutamina-tororo-don",with wathing twitter , facebook.
22:00......I began studying English gramar. I tried to pronounce English sentences harder and harder becauseMr.Yasukouchi said "You must spend half of studying-English time to pronounce,if you wont to speak English"on TV yesterday.
24:00......I was so tired that I was just asleep.