We often see there is a table-cloth, a book or something else on the desk in the classroom or library, [1]indicating the seat is taken. This kind of phenomenon is very usual in almost all colleges and universities. [2]Strangely enough, most of students seem to [3]take this for granted, and few will protest it.

　　[4]Though most of students’ taking seats in advance is for the purpose of better study, this kind of phenomenon has great negative effects. [5]On the one hand, it is a selfish behavior, which damages other students’ interests. [6]Even if many students come to the classroom very early, they can not find a seat. [5]On the other hand, reserving a seat [7]violates the rule of fairness. [8]No matter how late you come to class, the seat is still reserved for you [6]even though many others are eager for that seat.