完形填空All students in Australia have to wear a school u_______

完形填空
All students in Australia have to wear a school u________.In most Australian schools,classes b________ at 9:00 a.m.An Australian student does not have to go to class w________ his or her school bag.Most students have their o________ lockers to put their bags into,so they go to class with only a few books.Australian students study about eight s________.In Computer class,s________ work quietly in groups of four.The teacher walks around them and gives instructions（指令）.One class is as long as two hours.Lunchtime is at n________ and most students have lunch at school.There is only one or two classes in the a________.Students can go h________ at 3:30 p.m.Some students do not go home until 5:30 p.m.because they want to swim or play ball g________.