students ___ ___ wear school uniforms ___school days?学生在校时间必须穿校服
问题描述：
students ___ ___ wear school uniforms ___school days?学生在校时间必须穿校服
答
haveto =must必须
on在具体的天之前 如day用介词on
如果帮到你,请记得采纳,O(∩_∩)O谢谢求人工翻译：有些人竟然什么都没做To my surprise, Some people actually did nothing