For harmony, this section will be replaced with a short story, and let your imagination fill in the rest...
"Hey, Xiao Hei, stop doing the problems and pass me the water bottle," said the girl with a ponytail, pushing her deskmate sitting by the aisle. There was still one minute before the class bell was due to ring, there was just enough time to get some water.
The boy looked up at the girl, said nothing, and silently continued working on his problems, clearly unwilling to engage with her.
The girl wanted to say more, but at that moment, the pre-class bell rang. She clenched her fists tightly, muttering under her breath, "Stingy, grumpy guy, get up now, I need to get through!"
