1、I'd better hold on to my ticket stub in case they won't let me in.
我最好還是自己拿著票根吧，以防他們不讓我進來。

2、I better hold onto my ticket stub in case you get in before I get back.
我最好拿著我的票根，以防你在我回來之前就進場了。

3、In addition, should the economy class ticket stub be collected from him?
同時是不是要把他的經(jīng)濟艙的票根收回？

4、Show your ticket stub at the entrance.
在入口處出示你的票根。