https://online2.tingclass.net/lesson/shi0529/0001/1632/sl20051009.mp3
https://image.tingclass.net/statics/js/2012
about the only
= almost the only，都是‘大概只有，但也不會完全排除其它可能’的意思
About the only fun you'll have in that class is when the bell rings!
那堂課最有趣的事情大概就是鐘聲響的時(shí)候。
