Paragraph Ten When you wear cap and gown at ceremony of conferring degrees or diplomas, you will be following a custom that is many centuries old. The use of caps and gowns in college and universities goes back to medieval times. Nearly all gowns are made of black cloth. Some doctoral gowns use other colors, but the vast majorities are black. The dresses at g______
【正确答案】：graduation
【题目解析】：该段描写的是大学毕业或硕士毕业等重要场合的穿着，可以概括为“毕业时的穿着”，空白处缺少“毕业”一词，graduation符合题意。
