Who can tell me some classic jokes?

In the graduation season, there is a senior selling books at the entrance of the canteen. The slogan reads: "one yuan a copy, buy books for my sister!" " Looking at it decisively, a diaosi pretended to pick books and pointed to the slogan and said, "Where's senior?" The girl replied heroically, "Remember to see us off on the train the day after tomorrow." All the onlookers laughed, diaosi blushed and bowed her head.