https://online2.tingclass.net/lesson/shi0529/0009/9461/97.mp3
https://image.tingclass.net/statics/js/2012
Catch up 趕上;與別人看齊
I’d love to go with you but I’ve got some catching up to do.我也想跟你一起去，但我還得先趕進度。
Behind 在后面;落后;忘掉過去。
Look behind you! Something si coming! 看你身后!有東西過來了!
I’m behind in my work.我積壓了很多工作。
The accident is behind you now, so try to forget it.那場事故已經(jīng)過去了，忘了它吧
