【正确答案】Occupying a seat is common in universities. It has even become an unwritten rule and a hidden rule. Anywhere seats are relatively rare, be it classroom, canteen or library, occupying a seat happens. People differ in their opinions about this phenomenon. Some agree while some disapprove of it. It is a widely-known fact that seats on campus are limited. Under huge pressure of examinations like the final examination, judicial examination, CET-4 and CET-6, students have to spare time to occupy a seat, which makes busy studying life more disturbing.