问题补充：
–What do you often do classes to relax?
--Listen to music or walk around the school.
A. over
B. between
C. through
D. across
答案：
A. over
(答案→)B. between
C. through
D. across
解析：A. over 在…之上 B. between在…之间 C. through穿过 D. across穿过；句意：课间休息你经常做什么？听音乐或者在校园散布。根据句意故选B
