【When 】do you usually have peopraphy?On Monday.What day is it today?It's[].a monday b summer c November11th d 5：00amA Monday 星期一( 问星期）Do you have history [] the afternoon of monday?on具体到某一天或某一天的上午/下午/晚上用ONThe students are [ ] school.at固定用法：at school 在学校温馨提示：你的追问已够三次，先采纳再问好吗？否则你会被系统扣财富的。