he was born in还是on 14th September 1988

问题描述:

he was born in还是on 14th September 1988
原因
二楼,那为什么i went out on this Sunday morning呢?

出现了具体日期或者星期数 用 on
只有年份或者只有afternoon, morning, evening,用in
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看我说的,“只有afternoon, morning, evening,用in”,是只有,
sunday morning不是有星期数了么?^^