[al:新概念英语（第1册）第131课（跟读听写·美）]
[ti:Don't be so Sure!－别那么肯定！
[ar:© 2011 露珠英语工作室]
[by:http://weibo.com/DewEnglishStudio]
[00:00.00]I'm sure you'll enjoy yourselves.－我肯定你们一定会玩得很痛快。