9) The first few carriages were already packed with students, some hanging out of the window to talk to their families, some fighting over seats.头几节车厢已经挤满了学生,他们有的从车窗探出身来和家人说话,有的在座位上打闹。(头几节车厢已经挤满了学生,他们有的从车窗探出身来和家人说话,有的在争抢座位。)[ fight over 是‘争抢’的意思,没有‘打闹’的意思]