81.  She nodded, telling me that I didn't enter a wrong classroom.

82.  Her impressive performance on class made me sure that she majored in history.

83.  It was incredible for me that a student with such vast knowledge on history should come from the Institute of Software, which required excellent performance in science.

84.  Also, I couldn't believe that a student majoring in science could know more about history than me, a student leaning liberal arts.

85.  It was commonly considered that they were innocent with the outside world, and could only do well in the test.

86.  It is true that different area has its own characteristic, but every person is also unique.

87.  One is that everyone thinks what they learned is the most difficult subjects.

88.  The other is that it is taken for granted that one must take part in the Students' Union.

89.  It seems barely credible that someone else was willing to choose their course.

90.  It is obvious to learn that students always think that they are studying the most difficult subjects.