In fact, this is unnecessary. The teachers in our school are different every semester. In two semesters, the teacher said that the score did not count, and the other two semesters were equivalent to the total score 10. . . University is just a word "country". . . But getting high marks is right. . Ask the teacher, it seems that the teacher can operate the upgrade. At the beginning of the third semester, we did LV3, saying that the level was not right, and LV2 said that we had "finished studying" and refused to do it. Later, the teacher was upgraded. .

Also, even if you buy books, it is much cheaper to buy them online. . .