First day in interval和Last Day In Interval是什么意思?

有没有in the first day,on the first day on the first day还是in the first day on my first day还是in my first day First day in interval和Last Day In Interval是什么意思? on the first day还是in the first day还是at the first? in the first day on the first day区别哪个用在开头?A.in the first dayB.on the first day给个答案就行要选项 “在第一天”是on the first day还是in the first day in the first day of my life 还是on the first day of my life National Day in China is on October first.否定句 请问“the first day in a while”怎么翻译RT 英语：( )is the first day in a week. “（ ）is the first day in a week. the first day in a week的同义词 The first day in school的英语作文 the first day in middle school一片英语作文，题目是the first day in middle school，或者讲讲怎麽写 this is our first day in school为什么first不加the National Day in Canada is on July first.特殊疑问句on July first划线 yo will stay in the space for three day on the first day.翻译