on the first day还是in the first day还是at the first?

on the first day还是in the first day on the first day还是in the first day还是at the first? “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 on first day 对还是 on the first day 对 有没有in the first day,on the first day on my first day还是in my first day in the day还是on the day? On the first day 还是 on first day 如果加一个morning呢?如题 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 是in theday还是on the day in the second day 还是on the second day? 是in the day time还是on the day time 是on the open day还是in the open day in the raining day还是on the raining day 应该说on the first day还是at the first day能否仔细讲解一下on和at的用法,1 the first morning,the first day前面加不加on,还是都可以 yo will stay in the space for three day on the first day.翻译