81.  What's more, she could have her own comprehension toward some historical issues based on her broad knowledge on history.

82.  From the professor's facial expression, I could see his appreciation on her.

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

84.  Besides, she was quiet, friendly and book-loving.

85.  All these, as far as I am concerned, were evidence to prove she was an excellent and typical student of liberal arts.

86.  On a class close to mid-term exams, I took a seat right beside her as usual.

87.  This time, she wasn't reading, but calculating some mathematical puzzles.

88.  And from her frowning brow, she was learning really tough mathematics.

89.  If she was from the Department of History, she needed not to learn mathematics at all.

90.  So, in this way, she cannot major in history.