Pleasantmusicisoftenplayed

问题详情：

 Pleasant music is often played ____ classes to make students refreshed and relaxed for a while．

A. between           B. among              C. over                        D. after

【回答】

A课间播放愉快的音乐使学生清醒和放松。between两者之间，指两节课之间。

知识点：介词

题型：选择题