Surprises often come in boxes. Birthday presents wrapped in colorful paper, brown paper packages mailed from a friend … No matter what kind of box it is, people like to open it up and see what's inside. In America, and in many other countries, one special kind of box contains the future. It's called a ballot box. 人们在选举日投在箱子里的东西可以改变历史的进程。

答案：
What people put into the box on election day can change the course of history.
本句节选自《American Elections》