The days__you could travel without a passport are gone这里是填at which/ in which / on which

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The days__you could travel without a passport are gone这里是填at which/ in which / on which

The days__you could travel without a passport are gone这里是填at which/ in which / on which
The days__you could travel without a passport are gone
这里是填at which/ in which / on which

The days__you could travel without a passport are gone这里是填at which/ in which / on which
填 in which
at 后接时间点 如at 10 o'clock
on 后接具体某一天或日期 如 on Monday / on 7th April
in 后面可以接表时间范围的短语 如 in those days;
in the days to come; in the past few days

at which!!因为in 不能接day , on 不能接a an或者 the的词!!

选in 哦~常用短语,in those days

in which 不需要护照就可以出游的日子远去了