Once you get the study guide, make plans right away to study as soon as possible. No excuses! Killing time with friends isn't worth it，since you can always hang out with them any other day.

就代表前面的killing time with friendsHiPDA·NG

鞭尸？ iOS fly ~

倒装强调

worth it本身是个固定用法，it并不特别指代什么。

人间不值得

浪费时间不值得，具体不值得啥？一定要说it，那可以理解为时间本身的价值。
这样抠字眼我觉得不太对 iOS fly ~

worth it本身是个固定用法，it并不特别指代什么。

it is not worth 。。。

基友不值得

it有没有都是一个意思，只不过英语习惯这么说而已。

同意soulmad