The days__you could travel without a passport are gone 这里是填at which/ in which / on which
人气:237 ℃ 时间:2020-02-06 02:13:33
解答
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